Djúpavogskörin
Djúpavogskörin is a nice geothermal hot tub just south of Djúpivogur town. A borehole provides hot water and some locals put up two tubs for people to realx and enjoy the lovely view of the surrounding fjord.
Please make sure to keep it clean and leave no trace behind, even clean up if someone has left empty cans or other trash there.