— #1 Wellness destination in San Juan on
An ancient ritual,
restored in Old San Juan.
An ancient ritual,
restored in Old San Juan.
An ancient ritual,
restored in Old San Juan.
Set inside a restored 1800s building on Calle de la Cruz, Las Ruinas brings together eight thermal experiences, a boutique gym, and a smoothie bar across 11,000 square feet.
Set inside a restored 1800s building on Calle de la Cruz, Las Ruinas brings together eight thermal experiences, a boutique gym, and a smoothie bar across 11,000 square feet.
Set inside a restored 1800s building on Calle de la Cruz, Las Ruinas brings together eight thermal experiences, a boutique gym, and a smoothie bar across 11,000 square feet.
New to bathhouses? A ritual of heat, cold plunges, steam, and rest, experienced at your own pace. Discover the ritual that feels right for you.
New to bathhouses? A ritual of heat, cold plunges, steam, and rest, experienced at your own pace. Discover the ritual that feels right for you.
HOURS
Daily: 8 AM — 7 PM Members: 6 AM — 7 PM.
HOURS
Daily, 8 AM — 7 PM • Members: 6 AM — 7 PM
HOURS
Daily, 8 AM — 7 PM • Members: 6 AM — 8 AM
ADDRESS
104 Calle de la Cruz Old San Juan, PR 00901
ADDRESS
104 Calle de la Cruz Old San Juan, PR 00901
CONTACT
(786) 535-8054 — Whatsapp hello@lasruinas.com
CONTACT
(786) 535-8054 • hello@lasruinas.com
— Why Las Ruinas
A singular bathhouse
experience in Puerto Rico.
A singular bathhouse experience in Puerto Rico.
A singular bathhouse
experience in Puerto Rico.
01
The only bathhouse in Puerto Rico.
Eight thermal experiences brought together within a restored historic setting.
02
The only gym in
Old San Juan.
TechnoGym equipment, full air conditioning, and an open-air balcony.
02
The only gym in
Old San Juan.
TechnoGym equipment, full air conditioning, and an open-air balcony.
03
Come alone,
or bring friends.
Equally suited for quiet restoration or shared experience.
#1 of 45 San Juan
Spas & Wellness
4.9 Rated ★ ★ ★ ★ ★
from 400+ Reviews
4.9 Rated ★ ★ ★ ★ ★
from 400+ Reviews
5.0 Rated ★ ★ ★ ★ ★
from 170+ Reviews
5.0 Rated ★ ★ ★ ★ ★
from 170+ Reviews
"...All the staff are really attentive and regularly moving through the space to keep it tidy and clean. The smoothie bar was also fantastic when we wanted a tasty beverage during our visit.."
Natalie Trent
"...All the staff are really attentive and regularly moving through the space to keep it tidy and clean. The smoothie bar was also fantastic when we wanted a tasty beverage during our visit.."
Natalie Trent
The facilities are clean, the atmosphere is welcoming, and it’s a great place to recharge both physically and mentally... Definitely a hidden gem for anyone looking to unwind and stay active in one spot...
Lauren Martinez
The facilities are clean, the atmosphere is welcoming, and it’s a great place to recharge both physically and mentally... Definitely a hidden gem for anyone looking to unwind and stay active in one spot...
Lauren Martinez
...You get lost in the beautiful coral walls and “ruins” ... Facility is extremely cleanly, very well maintained, and there was definitely no shortage of clean towels!...
Lydia C
...You get lost in the beautiful coral walls and “ruins” ... Facility is extremely cleanly, very well maintained, and there was definitely no shortage of clean towels!...
Lydia C
— The Thermal Circuit
Eight thermal experiences
designed to restore body and mind.
Eight thermal experiences designed to restore body and mind.
The thermal circuit draws from traditional bathhouse rituals, reimagined through a modern, restorative experience. Begin anywhere, listen to your body. There is no required order.
195°F
5 to 20 min
Dry Sauna
Deep heat, muscle release, full-body reset.
156°F
10 to 30 min
Infrared Sauna
Gentle warmth designed for longer sessions.
115°F
5 to 15 min
Steam Room
Humid heat for breathing, skin, and circulation.
45 to 48°F
30 sec to 3 min
Cold Plunge
Cold immersion for recovery, clarity, and focus.
104°F
10 to 15 min
Thermal Bath
A slower transition between heat and rest.
open-air
Saltwater Pool
Cooling, floating, resetting between rounds.
COLD POUR
Dousing Bucket
An instant rush of cold between sessions.
complimentary
anytime
Tea Room
Tea, nuts, and popsicles served throughout your visit.
195°F
5 to 20 min
Dry Sauna
Deep heat, muscle release, full-body reset.
156°F
10 to 30 min
Infrared Sauna
Gentle warmth designed for longer sessions.
115°F
5 to 15 min
Steam Room
Humid heat for breathing, skin, and circulation.
45 to 48°F
30 sec to 3 min
Cold Plunge
Cold immersion for recovery, clarity, and focus.
104°F
10 to 15 min
Thermal Bath
A slower transition between heat and rest.
open-air
Saltwater Pool
Cooling, floating, resetting between rounds.
COLD POUR
Dousing Bucket
An instant rush of cold between sessions.
complimentary
anytime
Tea Room
Tea, nuts, and popsicles served throughout your visit.
— Train Or Simply Unwind
A space for movement
and rest, on your terms.
A space for movement and rest, on your terms.
A boutique gym integrated directly into the bathhouse experience, with recovery spaces steps away from the training floor. Use the bathhouse entirely on its own to relax, or pair it with a session in the only gym in Old San Juan, equipped to a standard you would expect in a private club.
A private-club approach to movement and recovery.
Train on premium TechnoGym equipment, then transition into the cold plunge, sauna, or thermal circuit.
Train on premium TechnoGym equipment if you like, then transition into the cold plunge, sauna, or thermal circuit. or skip the gym entirely and simply enjoy the bathhouse.
EQUIPMENT
TechnoGym, cardio, strength, free weights, functional training
EQUIPMENT
TechnoGym, cardio, strength, free weights, functional training
COMFORT
Fully air-conditioned. Chilled eucalyptus towels.
COMFORT
Fully air-conditioned. Chilled eucalyptus towels.
OUTDOOR SPACE
Open-air balcony for stretching, matwork, yoga
OUTDOOR SPACE
Open-air balcony for stretching, matwork, yoga
RECOVERY ON-SITE
Cold plunge, sauna, and thermal bath steps away
RECOVERY ON-SITE
Cold plunge, sauna, and thermal bath steps away
— Arrive
Enter the space
Check in, collect your locker key, and settle into the atmosphere of the bathhouse. Towels are available at the laundry window throughout your visit.
— Settle
Disconnect from the outside space
Change in the bathroom area, store your belongings, and ease into a slower pace.
— Explore
Follow the circuit naturally
Move between thermal experiences, recovery spaces, and moments of stillness throughout your visit.
— Pause
Refuel between rounds
Spend time in the Tea Room or stop by the Smoothie Spa, our organic smoothie bar focused on superfood and natural ingredients, before heading back into the circuit.
— A Self-Guided Ritual
A ritual shaped by centuries
of bathhouse tradition.
From Roman baths to Japanese onsens and Turkish hammams, bathhouse culture has long been centered around cycles of heat, cold immersion, restoration, and rest. Las Ruinas brings that tradition into a contemporary setting in Old San Juan.
— Arrive
Enter the space
Check in, collect your locker key, and settle into the atmosphere of the bathhouse. Towels are available at the laundry window throughout your visit.
— Settle
Disconnect from the outside space
Change in the bathroom area, store your belongings, and ease into a slower pace.
— Explore
Follow the circuit naturally
Move between thermal experiences, recovery spaces, and moments of stillness throughout your visit.
— Pause
Refuel between rounds
Spend time in the Tea Room or stop by the Smoothie Spa, our organic smoothie bar focused on superfood and natural ingredients, before heading back into the circuit.
— A Self-Guided Ritual
A ritual shaped by centuries
of bathhouse tradition.
From Roman baths to Japanese onsens and Turkish hammams, bathhouse culture has long been centered around cycles of heat, cold immersion, restoration, and rest. Las Ruinas brings that tradition into a contemporary setting in Old San Juan.
— Arrive
Enter the space
Check in, collect your locker key, and settle into the atmosphere of the bathhouse. Towels are available at the laundry window throughout your visit.
— Settle
Disconnect from the outside space
Change in the bathroom area, store your belongings, and ease into a slower pace.
— Explore
Follow the circuit naturally
Move between thermal experiences, recovery spaces, and moments of stillness throughout your visit.
— Pause
Refuel between rounds
Spend time in the Tea Room or stop by the Smoothie Spa, our organic smoothie bar focused on superfood and natural ingredients, before heading back into the circuit.
— A Self-Guided Ritual
A ritual shaped by centuries
of bathhouse tradition.
From Roman baths to Japanese onsens and Turkish hammams, bathhouse culture has long been centered around cycles of heat, cold immersion, restoration, and rest. Las Ruinas brings that tradition into a contemporary setting in Old San Juan.
— The Offers
Created for casual
visits and lasting rituals.
Created for
casual visits and lasting routines.
Created for
occasional visits and
lasting routines.
The Day Pass grants full access to the bathhouse experience. Memberships offer a more regular rhythm of restoration and recovery.
The Day Pass grants full access to the bathhouse experience. Memberships offer a more regular rhythm of restoration and recovery.
The Day Pass
2.5 hours of access to the gym, all eight thermal experiences, tea room, and lounge. Towels and water included.
Pricing varies by time slot · 30-minute entry windows
Infrared Sauna
Dry Sauna
Steam Room
Cold Plunge
Thermal Bath
Saltwater Pool
Lockers & showers
Towels
Water
Gym access
2.5 hours
Tea Room
Bring a swimsuit, workout clothes, and sandals. Robes, slippers, sauna hats, and smoothies are available on-site.
What's Included
The Day Pass
2.5 hours of access to the gym, all eight thermal experiences, tea room, and lounge. Towels and water included.
Pricing varies by time slot · 30-minute entry windows
Infrared Sauna
Cold Plunge
Saltwater Pool
Lockers & showers
Water
2.5 hours
Steam Room
Thermal Bath
Tea Room
Towels
Gym access
Bring a swimsuit, workout clothes, and sandals. Robes, slippers, sauna hats, and smoothies are available on-site.
What's Included
Explore Memberships
Explore Memberships
For guests who want the ritual as part of their week, with unlimited access
For guests who want the ritual as part of their week, with unlimited access
$360
Monthly
1 guest pass per month. No freezes.
$1,975
Semester
6 Months, 6 guest passes. No freezes.
$3,500
Annual
12 guest passes. Maximum of 3 months frozen per calendar year.
Unlimited access
Members-only hours : 6 AM to 8 AM
Member-only pricing
Exclusive member events
— The Space
11,000 square feet.
Three years of restoration.
11,000 square feet.
Three years of restoration.
HOURS
Daily, 8 AM — 7 PM Members: 6 AM — 8 AM
HOURS
Daily, 8 AM — 7 PM Members: 6 AM — 7 PM
ADDRESS
104 Calle de la Cruz Old San Juan, PR 00901
PARKING
La Cochera · Ballajá · Doña Fela All within a short walk
PHONE
(786) 535-8054
hello@lasruinas.com
— In Their Words
Why people keep coming back.
Why people keep coming back.
5.0
The space is beautiful and has a calm, relaxing vibe that makes it easy to disconnect for a bit. Everything felt clean and well taken care of, which I appreciated. The staff was friendly and welcoming, and overall it felt like a nice spot to unwind and try something different in Old San Juan. I would definitely go back.
Arianna Lopez
Posted on Google Reviews
5.0
The space is beautiful and has a calm, relaxing vibe that makes it easy to disconnect for a bit. Everything felt clean and well taken care of, which I appreciated. The staff was friendly and welcoming, and overall it felt like a nice spot to unwind and try something different in Old San Juan. I would definitely go back.
Arianna Lopez
Posted on Google Reviews
5.0
Super fabulous new addition in Old San Juan. The staff is fantastic and vibe is one point! Soft opening is a lovely way to start enjoying the space while they do the finishing touches. Both saunas are a 10+. Thank you for creating this hideaway 🙏
Christy Collins
Posted on Google Reviews
5.0
Super fabulous new addition in Old San Juan. The staff is fantastic and vibe is one point! Soft opening is a lovely way to start enjoying the space while they do the finishing touches. Both saunas are a 10+. Thank you for creating this hideaway 🙏
Christy Collins
Posted on Google Reviews
5.0
My experience at Las Ruinas in Old San Juan was absolutely incredible. The saunas and pools were spotless and deeply relaxing, the gym was modern and well-equipped, and the bathrooms felt luxurious and pristine. My massage was professional and rejuvenating, and finishing with a fresh smoothie made it even better. The calm atmosphere and attentive service made it feel like a true luxury wellness escape — I left feeling completely refreshed.
Javier O
Posted on Tripadvisor
5.0
My experience at Las Ruinas in Old San Juan was absolutely incredible. The saunas and pools were spotless and deeply relaxing, the gym was modern and well-equipped, and the bathrooms felt luxurious and pristine. My massage was professional and rejuvenating, and finishing with a fresh smoothie made it even better. The calm atmosphere and attentive service made it feel like a true luxury wellness escape — I left feeling completely refreshed.
Javier O
Posted on Tripadvisor
5.0
Las Ruinas is aesthetically appealing and not in the modern white and grey box looking way no, this bathhouse has personality, it carries an energy of beauty and tranquility that is quite refreshing to the eyes and mind. Apart from its aesthetic appeal, Las Ruinas boasts its all-in-oneness by offering a suite of amenities. She (yes feminine because she nourishes the soul) is complete with a full gym with all new equipment, a steam room, infrared and dry sauna, thermal pools, a cold plunge, and locker rooms with showers. Once you’ve moved, stretched, sweat, and swam go for sit in one of their lounging nooks which are all “a el Aire libre”. Read a book, have a chat with the members, or just stare off into the beauty that surrounds you. Come wander into this gem, you won’t regret it!
Ethan Blackwood
Posted on Tripadvisor
5.0
Las Ruinas is aesthetically appealing and not in the modern white and grey box looking way no, this bathhouse has personality, it carries an energy of beauty and tranquility that is quite refreshing to the eyes and mind. Apart from its aesthetic appeal, Las Ruinas boasts its all-in-oneness by offering a suite of amenities. She (yes feminine because she nourishes the soul) is complete with a full gym with all new equipment, a steam room, infrared and dry sauna, thermal pools, a cold plunge, and locker rooms with showers. Once you’ve moved, stretched, sweat, and swam go for sit in one of their lounging nooks which are all “a el Aire libre”. Read a book, have a chat with the members, or just stare off into the beauty that surrounds you. Come wander into this gem, you won’t regret it!
Ethan Blackwood
Posted on Tripadvisor
5.0
I went to Las Ruinas in Old San Juan, and it was just amazing. From the second I walked in, the vibe was calm, aesthetic, and just effortlessly beautiful. It feels luxurious but not intimidating — you actually want to spend hours in. I went between the sauna, steam room, and cold plunge, and it was unreal. The cold plunge especially wakes you up in the best way, and then going back into the heat feels so grounding. Everything was spotless and clearly high quality — you can tell they really care about the details. I also used the gym, which is super well-equipped and organized. It feels intentional and elevated. The bathrooms and locker areas were amazing as well. They were stocked with everything you need. I booked a massage and it was relaxing and exactly what my body needed. After that, I grabbed a smoothie, and it was so fresh and delicious (not just “healthy tasting” but genuinely good). It doesn’t just feel like a bathhouse — it feels like a luxury wellness experience. I already want to go back!!
Isabella G
Posted on Tripadvisor
5.0
I went to Las Ruinas in Old San Juan, and it was just amazing. From the second I walked in, the vibe was calm, aesthetic, and just effortlessly beautiful. It feels luxurious but not intimidating — you actually want to spend hours in. I went between the sauna, steam room, and cold plunge, and it was unreal. The cold plunge especially wakes you up in the best way, and then going back into the heat feels so grounding. Everything was spotless and clearly high quality — you can tell they really care about the details. I also used the gym, which is super well-equipped and organized. It feels intentional and elevated. The bathrooms and locker areas were amazing as well. They were stocked with everything you need. I booked a massage and it was relaxing and exactly what my body needed. After that, I grabbed a smoothie, and it was so fresh and delicious (not just “healthy tasting” but genuinely good). It doesn’t just feel like a bathhouse — it feels like a luxury wellness experience. I already want to go back!!
Isabella G
Posted on Tripadvisor
— Frequently Asked
Everything to know before your visit.
Everything to know before your visit.
What exactly is a bathhouse?
A wellness space designed around heat, water, and rest. You move freely between saunas, steam rooms, cold plunges, pools and relaxation areas at your own pace. Unlike a spa, there are no treatments or appointments. The experience is the space itself.
What should I bring?
Swimsuit, workout clothes for the gym, and sandals or slippers. We provide towels, water, shampoo, conditioner, shower gel, and blowdryers. Robes, slippers, and sauna hats are available to purchase on-site.
Are all spaces mixed gender?
Yes. All thermal and common spaces are mixed gender. Locker rooms, showers and bathrooms are gendered. Swimsuits required in all thermal areas. No nudity.
Is there parking?
We don't have on-site parking, but we're a short walk from Old San Juan's main public garages: La Cochera, Ballajá, Doña Fela, La Puntilla, and Covadonga.
Is the thermal circuit safe during pregnancy?
If you're pregnant or have any medical conditions, please consult your healthcare provider before using heat and hydrotherapy installations.
Do I need to book in advance?
Booking ahead is recommended, especially on weekends. Walk-ins welcome subject to availability. Entry slots are every 30 minutes.
Is there an age requirement?
Las Ruinas is an 18+ facility.
How is the water kept clean?
Our pools use ozone and UV filtration systems. Pools are professionally maintained on a weekly basis and tested regularly.
What does the Day Pass include?
2.5 hours of full facility access: the gym, all eight thermal experiences (saunas, steam, cold plunge, thermal bath, saltwater pool, dousing bucket), the tea room, and our lounge spaces. Towels and water included.
Are massages available?
Massage services are not currently available. Updates will be announced on Instagram @lasruinaspr.
Can I bring food or drinks?
Outside food and drinks are not permitted. Our Smoothie Spa offers smoothies, fresh juices, and wellness shots. Complimentary tea, nuts, and popsicles in the Tea Room.
What exactly is a bathhouse?
A wellness space designed around heat, water, and rest. You move freely between saunas, steam rooms, cold plunges, pools and relaxation areas at your own pace. Unlike a spa, there are no treatments or appointments. The experience is the space itself.
What should I bring?
Swimsuit, workout clothes for the gym, and sandals or slippers. We provide towels, water, shampoo, conditioner, shower gel, and blowdryers. Robes, slippers, and sauna hats are available to purchase on-site.
Are all spaces mixed gender?
Yes. All thermal and common spaces are mixed gender. Locker rooms, showers and bathrooms are gendered. Swimsuits required in all thermal areas. No nudity.
Is there parking?
We don't have on-site parking, but we're a short walk from Old San Juan's main public garages: La Cochera, Ballajá, Doña Fela, La Puntilla, and Covadonga.
Is the thermal circuit safe during pregnancy?
If you're pregnant or have any medical conditions, please consult your healthcare provider before using heat and hydrotherapy installations.
Do I need to book in advance?
Booking ahead is recommended, especially on weekends. Walk-ins welcome subject to availability. Entry slots are every 30 minutes.
Is there an age requirement?
Las Ruinas is an 18+ facility.
How is the water kept clean?
Our pools use ozone and UV filtration systems. Pools are professionally maintained on a weekly basis and tested regularly.
What does the Day Pass include?
2.5 hours of full facility access: the gym, all eight thermal experiences (saunas, steam, cold plunge, thermal bath, saltwater pool, dousing bucket), the tea room, and our lounge spaces. Towels and water included.
Are massages available?
Massage services are not currently available. Updates will be announced on Instagram @lasruinaspr.
Can I bring food or drinks?
Outside food and drinks are not permitted. Our Smoothie Spa offers smoothies, fresh juices, and wellness shots. Complimentary tea, nuts, and popsicles in the Tea Room.
Step inside the ruins.
Open daily, 8 AM to 7 PM. Walk in or book ahead.
