At Aker Brygge, KOK has four wood-fired sauna boats on a pier by the harbour promenade, facing Akershus Fortress and the inner archipelago. The shared sauna, FELLESKOK, takes up to eight people for 1.5 hours including changing, and a sauna master keeps the stove going. Guests cool off by jumping into the fjord or using a ladder. There is a rinsing hose but no cold shower, and no toilets on the pier. Boats can also be hired privately for up to ten people or booked for a sauna cruise.