Heitlaugen Badstu is a wood-fired sauna on Grytøya in Harstad municipality, run by Grytøya Badstulaug. The sauna has wooden benches and a pointed-arch window with a view towards sea and mountains.
Drop-in costs 100 kr per person. Pre-heating can be ordered for an extra 150 kr and must be arranged in advance. Drop-in times are announced on Facebook.