Old San Juan Thermal Spa: Hot/Cold Plunge, Sauna, Steam & Gym

Recommended by 99% of travelers

Badge of Excellence

San Juan, Puerto Rico

Great choice

20+ bookings last month.

1 to 9 hours (approx.)
Mobile ticket

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Overview

Recharge after a day exploring the hot, busy streets of Old San Juan with a full-day pass to a thermal spa and gym. Enjoy unlimited access to a heated swimming pool and cold plunge pool, saunas, a steam room, and a fully equipped gym. Towels, robes, slippers, lockers, and light snacks are included, so you can relax without having to pack anything other than your swimming and workout gear.

Unwind after a busy day of sightseeing in San Juan
Hydrate and reset with herbal teas, nuts, an popsicles
Indulge without worrying about valuables: Personal lockers are provided
Enjoy the convenience of a spa located in the heart of Old San Juan

What's Included

Snacks

Guests can enjoy teas, along with warm and cold water, to hydrate and reset between circuits. Light snacks such as nuts and popsicles are available to help replenish and balance the body.
Locker

Each guest has its own locker
Towels, Robe, and Slippers
Unlimited, full-day access
Access to heated swimming pool
Hot plunge pool and cold plunge pool (hot and cold contrast bathing)
Choice of dry sauna, infrared sauna, or eucalyptus steam room (unlimited access)
Unlimited fresh towels
Personal locker with key
Herbal teas, warm and cold water
Light restorative snacks (nuts, fruits, and popsicles)
Full access to the equipped gym

Smoothie Bar items (available for purchase on-site)
Gratuities
Re-entry

Meeting and Pickup

Meeting point

104 C. de la Cruz, San Juan, 00901, Puerto Rico
Arrive and get a brief intro to the space, experience, and what to expect. Locker assigned and time to change

End point

This activity ends back at the meeting point.

What To Expect

Las Ruinas Bathhouse & Gym

Admission Ticket Free

Additional Info

Confirmation will be received at time of booking
Not wheelchair accessible
Not recommended for travelers with back problems
Not recommended for pregnant travelers

No heart problems or other serious medical conditions
Travelers should have a moderate physical fitness level
This tour/activity will have a maximum of 20 travelers

Supplied by

Cancellation Policy

You can cancel up to 24 hours in advance of the experience for a full refund.

Traveler Photos

Gallery picture 1 (from a traveler's review)

Gallery picture 2 (from a traveler's review)

Gallery picture 3 (from a traveler's review)

Gallery picture 4 (from a traveler's review)

Gallery picture 5 (from a traveler's review)

Reviews

5.0

based on 152 reviews

Total reviews and rating from Viator & Tripadvisor

We perform checks on reviews

Book. It. Treat Yourself to this

Meg_H, Jul 2026

If you're on a health journey you will be inspired here. The staff is so kind and helpful. A beautiful space and they have thought of all the details. Bring your bathing suit, they even have a machine that rings out your bathing suit for you and a bag for damp items. They provide shampoo/conditioner and body wash; they have hair dryers with different adaptors such as a diffuser (bring your own hair styling products) This came with a complimentary robe and water proof slippers. Be aware that the dumbbells in the gym are Kg NOT lbs (I do think there should be a sign for this as I almost injured myself attempting to lift what I thought was 50lbs but was 50kgs, BIG difference) I did not have a smoothie and honestly regret not trying as they looked delicious. You will not regret treating yourself to this.

Relax mid vacation after el yunque adventures!

Keila_S, Jul 2026

Beautiful relaxing bathhouse with a clean atmosphere. Traveling with my sister for a girls trip and this experience was a highlight of our week!

No water!

Charles_B, Jun 2026

Puerto Rico suffered an aqueduct problem and many are without water. It was not the fault of the spa. Just unfortunate for us. The staff was very nice.

Cannot recommend enough!

Sean_B, Jun 2026

The perfect way to start off vacation and unwind from work stress. Cycled through infrared sauna and steam room, cold plunge, then float in the mineral water pool. Did this multiple times and they have free cold water & popsicles, and teas. Absolutely relaxing & very clean facility. I should have went to the gym here instead of the hotel gym. That Was very nice with modern equipment but I didn’t take advantage. Friendly and helpful staff, unlimited towels and just a beautiful time in an old world style building. Finished with a delicious healthy drink at the smoothie bar. Can’t wait to return. 12/10 recommend.