The Tree House, as well as two charming new cottages, is on the grounds of the 35 acre Bio Thermales private rainforest with natural hot springs in the north-central Costa Rican heartland of rural farms and orchards near Aguas Zarcas and San Carlos (Quesada). This is authentic Costa Rica: clean, comfortable and close to nature. Three hours north of San Jose (airport), 45 minutes east of Fortuna and Volcano Arenal.
Guests enjoy 24/day access to our hot springs at no extra charge. We do not charge for children 17 and under.
Our hot springs are ancient “deep Earth” sources that bubble up through the rainforest floor, laden with mineral-rich waters that have been in the Earth for at least 10,000 years. Our waters are rich in bicarbonates, calcium and magnesium, low in sulfur, and slightly acidic -- qualities shared by many of the world's best hot springs. Four of our 8 organic form hot springs pools are located in the rainforest, and 4 hot springs pools as well as a large cool spring swimming pool are located in a meadow, surrounded by rainforest (see below for more information).
Parents of young children should evaluate whether the height of the Tree House is safe and appropriate for their children.There are railings around the balcony and stairs but a determined child could climb over them and fall or a very small child could crawl through the spaces in the railing. Every child is individual and their parents must use their best judgment and assume any risk.
The Tree House is built to strict Costa Rican building codes, but as with all tree houses, there is some movement when the wind blows, and this could be uncomfortable for people very sensitive to motion sickness.
You may see our other listings on Airbnb at:
Tucano Casita (Toucan Casita) is listed as "Rainforest Casita with Hot Springs": airbnb.com/rooms/30358
Mariposa Casita (Butterfly Casita) is listed as "Rainforest Casita2 with Hot Springs" airbnb.com/rooms/51518
Colibri Casita (Hummingbird Casita) is listed as "Rainforest Casita3 with Hot Springs"
airbnb.com/rooms(phone number hidden) House: "Rainforest Tree House with Hot Springs" airbnb.com/rooms/50435
You can check availability of each accommodation by clicking on the "Calendar" tab above the main photo on each listing.
Tree House features: (see floor-plan for all details):
• Perched high among the rainforest trees, the Tree House has large screened areas for circulation of naturally cooler breezes. It also has fans.
• All onsite hot springs and recreation activities included, including 24 hour access to the hot springs and cool spring swimming pool
• The Master bedroom with a Queen sized bed with orthopedic mattress and hypoallergenic bedding is in a loft
• One the main floor, two twin-sized beds that can double as settees with thick foam mattress and hypoallergenic bedding
• Hand-crafted rustic furniture from naturally harvested trees on the land
• Main floor kitchen with refrigerator, micro-wave, coffee maker, basic kitchenware
• Bathroom with flash on-demand hot-water heater
• Wrap around balcony for relaxing and animal and bird watching
• Maid service every 3 days included
• Laundry service at extra charge per load
• Short walk to rainforest and hot springs pools
• No telephone or television
• WiFi internet for your laptop -- if reliable 24 hour internet is essential to you, please message us for suggestions.
• Hosts Kathy and Bernie live onsite
• Languages: English, Spanish, German, limited French
One time $10 cleaning fee; thereafter housecleaning services every 3 days are free.
Bio Thermales Hot Springs features:
• Our hot springs pools are all-natural mineral water just as it flows from the Earth
• Rainforest Pools from 90° - 105°F (31° - 40°C)
• Grotto Pools in meadow flow from the 112°F/45°C source pool onward into two larger and progressively cooler pools which are handicap-accessible and suitable for small children.
• Cool Pool in meadow is 90°F/31°C mineral water flowing from the thermal creek
• 2 Swimming pools with continuous flow of natural cold spring water (88 degrees) - one is 1 to 1.5 meters deep, and the larger is 3 meters deep.
• Bathhouse in meadow with handicap accessible bathrooms and showers
• “Ranchos” – roofed tables with concrete floors and grills for picnics
Other Activities on our 35 acre rainforest reserve:
• Bird-watching: many types of toucans, oropendulas, parrots, hummingbirds, and the rare green macaw
• Rainforest: enjoy it from the casita porch or hot springs pools, take easy walks on paths or more adventurous hikes
• Fossils – enjoy our collection or hunt (gently) for your own
• Wildlife: two-toed sloths, iguanas, capuchin and mantled howler monkeys, tree frogs, birds, butterflies, and many others.
We are a 45 minute drive from the many activities in Fortuna and Volcano Arenal -- such as ziplines, hanging bridges, white water rafting, slow river floats or kayaking through wildlife sanctuaries -- or 20 minutes from the less trodden cloud forest of Juan Castro Blanco National Park.
Bio Thermales Hot Springs is open to the public for day use of the hot springs, and most of our day visitors are Costa Ricans, so you may also meet new Tico friends. Bio Thermales is generally not crowded, however, except on major holidays and Sundays.
Food/Meals: The Tree House has a kitchen. There are many restaurants and a good supermarket within a 15 minute drive. Traditional Costa Rican meals can be delivered from a local caterer for very reasonable prices (Costa Rican food is tasty but not spicy). Otherwise, for those without cars, we can call a taxi or synchronize a food shopping trip when we go to town for errands.
Driving from SJO airport: Please message us before booking if we are your first and/or last destination in Costa Rica.
We recommend at least a small 4 wheel drive car. The last 3 kilometers are country roads.
Three hours of daylight are needed to safely drive here from the SJO airport before sunset at 5:30 pm. The drive through mountainous cloud forests is splendid in daylight, but prone to fog and rain, especially at night, creating hazardous visibility conditions after dark. Finding our countryside location will also be far easier if you arrive the first time before sunset. If your plane lands in the morning to noon, you can drive here directly from the airport. Otherwise, it is safer to book a room near the airport on your first night, or book a private driver ($130) and have a rental car delivered at no extra charge.
Last night in Costa Rica:
Driving directly to the SJO airport on the same day is possible if you book a flight in the afternoon. Please be aware that you must be at the airport 2.5 hours before departure. If you have an early morning departing flight it is basically necessary to stayi near the airport on the night before.
Four of our 8 organic form hot springs pools are located in the rainforest, and 4 hot springs pools as well as a large cool spring swimming pool are located in a meadow, surrounded by rainforest and one cool fresh spring pool in the rainforest (see below for more information). Casita guests enjoy 24 hour hot springs pools and 35 acres of rainforest access at no charge.
We enjoy interacting with our guests and making suggestions for and even help book activities in the area, as well as options for transportation. For personal interaction, we take our cues from our guests -- if they prefer privacy, we respect that; if they enjoy interaction, we are open to interaction and have met many delightful new friends in this way.
Kathy & Bernie have been great hosts. They are helpful and kind and they explain and help you in anything you may need. Moreover, the tree house is amazing, comfortable, cozy, tidy and very clean. It's been one of the best places we've ever stayed in and one of the best experiences in our trip to Costa Rica.
Our family of four (kids ages 11 and 13) stayed 4 days in the "tree house". Nothing like waking up to howler monkeys and watching toucans fly by as you drink your coffee on the veranda. The owners were away when we were there but we were well cared for by Johan the caretaker. If you go, I highly recommend staying during the week when it's less busy. We loved the tree house, but not so sure I'd want to be in one of the cabins. We were also very glad we brought earplugs and eye covers as the sun comes up early and the cicadas are LOUD! Having the hot springs to ourselves "after hours" was lovely. The grounds are clean and very well cared for. It's at least a 45 min. drive to the La Fortuna/Arenal area so take that into account if you go. We loved it :-)
We loved it! The treehouse was super cool, the hot springs on site were fantastic and (property manager) Johan and his family were incredibly welcoming. Kathy and Bernie were away travelling at the time of our arrival but we were 100% taken care of with extremely detailed driving directions and helpful car rental / food information ahead of time and the wonderful staff on site when we arrived. The drive through the cloud forest from San Jose was amazing. There's a great grocery store nearby and we had the rest of our food delivered from their reasonably priced local caterer. Hot spring pools all to yourself at night under the stars!!! You should book this!!!
This place was exactly what we were looking for: clean, comfortable, simple, and in the forest. We didnt get the pleasure of meeting Kathy and Bernie, but their Tico manager Johan was fantastic. He assisted us in preparing for our trip up to Nicaragua and gave us some much needed lessons on culture. The hot springs are gorgeous and the lack of light pollution really makes the sky amazing out here. We saw monkeys and tons of different birds. The catered food was also very good.
The catch - this place is out of the way, approximately 45 minutes from La Fortuna. The road is acceptable but rough, there are not many amenities close by. For us, we wanted to be in the jungle, we arent scared (email hidden), and love to soak in the hot springs with no one around. This was 100% better than any city hotel.
I will definitely be back and was happy to have this as part of our Costa Rica experience. Thanks Kathy, Bernie, and Johan for your obvious care and pride in this property.
We spent 4 glorious days at the tree house. It was me and 2 children, 7 and 12. It was so peaceful (not quiet, but all natural bird calls and cicadas) and beautiful. The pools were amazing. It was everything we hoped for and I wouldn't hesitate to recommend it. Unfortunately we didn't get to meet Kathy or Bernie, but Kathy was so helpful before the trip and with arrangements.
Her suggestion of hiring Frank to drive us from San Jose was perfect. A wonderful gentleman. We also arranged to have a rental car delivered there and that worked well also.
It is defintely a place to relax. I would love to go back. Thank you!!
We stayed at the Rainforest Tree House with hot springs from March 7-10, 2014. We LOVED it! It was great for our family (2 adults and 2 kids - aged 8 & 12). We loved being surrounded by the jungle, which does mean you can hear cicadas, animals and the river flowing - especially at night.
The kitchen was small but has everything you need. Dish soap, sponge, and dish towels were provided.
The upstairs loft does not have curtains on the windows, so if you're sensitive to morning light bring an eye mask.
We appreciated that there were composting and recycling facilities available.
The Ticos (locals) do visit the hot springs, but we found being immersed in the local culture an asset not a deficit. The Ticos are friendly and leave by 6 PM. As a renter, you have access to the hot springs at night. It's really cool to have a warm soak in the dark to the melody of the jungle. Ticos mostly come on the weekends. We had the place to ourselves during the week.
La Fortuna and Arenal Volcano are approximately 40 minutes away so we found the tree house to be a great base camp.
We found Kathy's directions to be excellent. The route she suggested from San Jose to the tree house was stunningly beautiful and a wee bit scary. The road is paved but has many zig zags and hairpin turns. Warning - traversing this road may bring out the driver's inner Mario Andretti! Traveling this route allows you to see small villages and touristy things not listed in the guide books. We would travel this way again in a heartbeat. There is a great grocery store in Aguas Zarcas, which is 20 minutes away.
The road up to the hot springs is very bumpy. You will need a 4 x 4.
We would highly recommend the Rainforest Tree House. We would stay here again for sure!
a very nice tree house, lovely built, with care for every little detail. in the afternoon you can watch the birds in the trees and in the early morning the animals in the jungle. Amazing. And the hot springs are so nice and relaxing. You can stay for hours and watch into the green canopy.
During the time of preparing the holidays Kathy was so warmhearted concerning and worrying about us, so we came very well prepared to this great adventure costa rica!
Two days like a dream !
The nest into the trees is perfect to stay in phase with the nature !
Kathy and Bernie had been perfect hosts !
Thank you again.
We had the great pleasure and the real treat of spending 3 nights at Bio Thermales last week. Our hosts Kathy and Bernie were wonderful, immensely knowledgeable and responsive to all of our needs.They have built a truly marvelous and unique property situated conveniently between Muelles and Aguas Zarcas, an hour from the chaos of La Fortuna and Arenal.The Cabinas are comfy and fully equipped with all the kitchen wares and appliances you'd need (be sure to bring all your food and supplies). We stayed in the treehouse - 31 steps up to the most amazing views of the property out front and the jungle out back from the 360 degree balcony. It is capped by a loft wrapped in the most amazing windows I've ever seen! The centerpiece of the place of course are the stone crafted natural hot springs and pools which beckon you all day and all night long. Springing right out of the mountains behind the Cabinas, the mineral waters are just perfect with a range of temperatures to satisfy anyone's preference. We are definitely going to stay there again!
The Treehouse, the hot spring pool in the rainforest are really great. In the morning i saw 8 monkeys "working" in the big tree, while i was relaxing in the hot nature pool. Its an extraordinary place, but dont go there on weekends. Biothermales is also a popular place for Tico families and its very crowded (more than 200 people around the threehouse having a barbecue and spending a good time there).
From Monday to Friday its a wonderful quiet place.
This is the final rate, including any fees from the host and Airbnb.