Fort Resort Beemster is built into a fort of the UNESCO-listed Stelling van Amsterdam, north of the city, with nine saunas including a wood-fired Maa sauna, a Kelo sauna, a Himalayan salt sauna, a bird's nest sauna, a bat sauna, a panorama sauna, a botanical sauna, a caldarium and an infrared cabin. Sauna masters run daily opgietingen, singing-bowl sessions and scrubs. Around them are salt and herb baths, warm and cold walk-through baths, a snow shower and a natural swimming pond. Open daily 9.45 to 23.00, entry from 45 euro.