Netherlands

Exclusive Mandarin Oriental in a 19th-century Amsterdam conservatory — Akasha Spa with indoor pool, sauna, steam bath, Thai massage and yoga.

Japanese-Dutch luxury hotel with 300 rooms and Nagomi Spa — indoor pool, Turkish steam bath, whirlpool and three Michelin-starred restaurants.

Six connected 17th-century canal palaces on the Herengracht — Guerlain Spa with sauna, steam bath and Michelin-starred Spectrum restaurant.

Amsterdam hotel with sauna, steam room, fitness centre, garden, and a strong sustainability programme, plus 11 meeting rooms for business guests.

Amsterdam hotel in Oost with an outdoor pool, sauna, fitness centre, garden, and bicycle rentals, beside the Tropenmuseum.

Historic 1896 five-star on the Amstel — Skins Institute Spa with sauna, indoor pool, whirlpool and three restaurants including a Michelin kitchen.
In most Dutch public saunas, yes — the textile-free tradition matches German sauna culture. Some venues offer single-gender or swimsuit days; check the venue's website.
Zuiver is the largest and most polished, Sauna Deco has historic Art Deco interiors, and Sauna Fenomeen is the most affordable neighborhood option.