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 relax 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.
Public bathrooms are located in the house of Faktor in Djúpivogur town which is a short distance from the hot tubs. Please use the bathrooms rather than nature around the tubs.