One of the most romantic thermal pools can be found (and you might also recognize it from the series Game of Thrones) right in the Grjótagjá cave. Due to constant changes, the pool has become too hot for bathing in recent years, but you can still visit to admire the beauty of the place. You can enter the cave through two entrances, and it’s up to you which one you choose. The cave and the pool are relatively easy to access, unlike the nearby Stóragjá.
The Grjótagjá thermal pool is located directly in the Grjótagjá cave.