Adak Hot Springs is located on Adak Island, Alaska, USA. Its thermal waters, at 40°C, are available in an indoor or outdoor bath, with a sauna and massage area, at the far end of the Aleutian Islands.
Insider tip — Adak Island in the central Aleutian Islands is one of the most isolated communities in the United States — a former Navy base on a volcanic island halfway between Alaska and Japan, where North Pacific storms converge with raw geological power. The hot springs on Adak emerge from the intense volcanic activity of the Aleutian arc, where the Pacific Plate subducts beneath North America at a rate that produces some of the world's most active volcanic and geothermal systems on Earth.