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.
How to find Stóragjá geothermal pool:
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!
GPS coordinates of the Stóragjá geothermal pool: 65.638686, -16.910707 Take me there!