Stóragjá is a cave with geothermal pool close to its more famous ‘sister’ Grjótagjá. Entering the pool is bit inconvenient and not for everyone (rappelling style entrance). But in contrast with Grjótagjá, here, you can have a bath.

There is a turnoff for pedestrians from the road nr. 1 here (GPS: 65.639844, -16.909571). After about 200 meters/yd, there is a metellic staircase. Go down and you are there!