K13 is a men-only sauna in the middle of Oldenburg, a short walk from the main station. Admission is from 18.
The wet side has a Finnish dry sauna, a steam room and a relaxation room, with a solarium, massage and an atrium garden for the hours in between. A bar serves drinks and snacks, and there is free internet.
The cruising side is set out just as plainly. There is a darkroom, a sling, a St. Andrew's cross, a glory hole and a gangbang area, along with a video room. Double and private cabins are there for anyone who would rather have a door.
The house calls itself a place for relaxation, recreation and fun among like-minded men. Sauna infusions and theme days run through the week, and foam parties are part of the regular programme.