If you are searching for things to do in Koh Samui that go beyond temple tours and beach hopping, pay attention. There is a full-day experience on the island that has earned 155 five-star reviews on Google and it has nothing to do with spas, cocktails, or sunset cruises.

It is called UNTAMED, run by Breathflow Connection. And it is unlike anything else available on the island.

Not a Spa Day. Not a Yoga Class.

You have probably seen wellness activities offered at resorts across Koh Samui. A morning stretch here. A meditation session there. Maybe a sound bath if the hotel is upscale enough. Those are fine. But they are surface-level.

UNTAMED is a full day. Eight hours. You get picked up from your hotel in the morning and returned in the late afternoon. In between, you go through guided breathwork that lasts a full hour, sit in an ice bath cooled to 2 to 5 degrees Celsius, hike to a waterfall with your mouth taped shut in complete silence, and participate in screaming and laughing rounds at the base of a jungle waterfall.

There is also a proper lunch included, connection exercises with the other participants, and a closing circle that brings the whole day together.

What Makes It Different

Three things set UNTAMED apart from every other wellness activity on Koh Samui.

First, the facilitator. Diego Pauel has lived on this island for over 15 years. He was the first person to bring breathwork and ice baths to Koh Samui, starting during COVID in 2020. His background is in freediving, which means his understanding of breath control is not theoretical. He has spent over a decade training people to manage their breath in extreme conditions. He brings that same precision and calm to every session.

Second, the structure. This is not a buffet of random wellness activities. UNTAMED follows a deliberate arc that builds through the day. The breathwork opens you up. The ice bath shocks your system in a controlled way. The silent hike forces you to slow down. The waterfall releases whatever is left. Each phase prepares you for the next.

Third, the intimacy. Groups are capped at 16 people. Diego facilitates every session personally. You are not a number on a booking sheet. You are seen, guided, and held accountable for actually participating.

The Practical Details

Here is what you need to know if you are planning your week on the island.

When: Every Sunday
Duration: Approximately 8 hours including hotel pickup and return
Price: 3,500 THB per person (roughly $100 USD), everything included
Group size: Maximum 16 people
Experience required: None. Complete beginners are welcome.
What to bring: Comfortable clothes, a swimsuit, willingness to try something new

The price covers hotel pickup, the full day experience, and lunch. No hidden fees. No upsells.

What People Say

With 155 five star Google reviews, UNTAMED is the highest rated wellness experience on Koh Samui. That is not a marketing claim. You can check it yourself.

The reviews consistently mention the same things: the breathwork was more powerful than expected, the ice bath was terrifying but transformative, the waterfall hike was a highlight, and Diego creates an environment where you feel safe enough to actually let go.

People regularly describe it as the best thing they did during their entire trip to Thailand.

How to Book

Book UNTAMED directly here or message Diego on WhatsApp. Spots fill up regularly because of the 16 person cap, so booking a few days ahead is recommended. Last minute bookings sometimes work depending on availability.

If you only do one thing in Koh Samui that is not a beach, make it UNTAMED.