Previously people use to bathe in this cave but during volcanic eruptions from 1975 to 1984 the temperature of the water rose to more than 50 °C. It is apparently now slowly dropping and when I felt the water it was perfect bathing temperature! Unfortunately there is a a sign up outside saying the cave is only for photography. Look up a cave named Stóragjá as apparently it's not far from here and you can swim inside!
Time Required: 20 minutes