The distinctive 1960s tent-shaped buildings have always represented the architectural hallmarks of the former GWATT Centre. Their distinctive shape – together with the nearby Kander River Delta – were the inspiration for the Deltapark brand and logo. Since having been acquired by the hotel, both the Seehaus and Landhaus have been transformed into an alpine-inspired spa on the shores of Lake Thun. Wellness and fitness lovers will find everything their hearts desire behind the new, modern facades. A wellness area (admission from 12 years) on four floors with 800m² of pools (indoor saltwater pool & outdoor freshwater) awaits you.

Situation Covid-19

The wellness area is accessible for hotel guests only.
The Private Spa Suites can be booked by day guests.

Deltaspa brochure (PDF) 

Vitalbistro Deltaverde im Hotel Deltapark in Gwatt bei Thun

Opening hours:

Pool* & Fitness** 7.30 a.m to 9 p.m
Textile* spa area  9 a.m to 9 p.m
Nudist** spa area 11 a.m to 9 p.m

*Access to saltwater pool and all spa areas is NOT allowed for children under 12 and unaccompanied minors.
**Admission just for adults.

On the day of arrival the wellness area is accessible from 1 p.m and on the day of departure until 1 p.m

110m² indoor salt water pool

The Deltapark ships in natural saline water specially from the Rhine saltworks in Schweizerhalle. Guests are invited to relax in the pleasantly warm natural salt water (9% concentration) while enjoying the unique view over Lake Thun.

30m2 outdoor fresh water whirlpool

The fresh water whirlpool offers a relaxing bathing experience: guests can relax in the 35°Celcius water and savour the magnificent view of Lake Thun and the beautiful mountain landscape.

Sauna area

Swimsuit saunas*

An elegant staircase leads our guests directly from the pool to the swimsuit saunas on the second floor. Choose from the herbal bio sauna, chalet classic sauna, natural stone steam bath and several special-effect showers. In addition, spa lovers will enjoy three relaxation rooms and spacious outdoor terrace with unparalleld views over the blue waters of Lake Thun. The second floor is reserved for guests who prefer to keep their bathing costumes on.
(* admission for ages 12 & over)


Traditional saunas**

Friends of the classic sauna experience will find the area for nude saunas on the third floor- with a choice of a mountain-salt sauna, noble bio sauna and mystic steam bath. A spacious foyer with fireplace, ice fountain and footbaths are also available to complete your spa experience.
(** the traditional sauna is reserved for adult guests)

Gabled attic rest room

If you are looking for peace and relaxation, you will love our attic area with its 55 m2 relaxing room. This vantage point also offers a unique view over the lower Lake Thun basin.


Die Spa und Fitnesszone im Wellnesshotel Deltapark in Gwatt bei Thun

Frau lässt sich im Pool treiben im Deltapark Vitalresort

Day Spa guests

The wellness area is accessible for hotel guests only.
The Private Spa Suites can be booked by day guests.

Day spa admissions 
Private Spa Suites 
Treatments | +41 33 334 30 36
Deltaspa brochure (PDF) 


Treatments Dayspa Private Spa Suites