Þvottahellir (washing cave) near Glymur in Botnsdalur
We descended through this cave on our way to Glymur waterfall. Here's another image from the unnamed cave
Update: I found out that its name is "Þvottahellir" or Washing Cave. In olden days it was used to dry wet laundry in rainy weather.
Taken on July 28, 2007