Icelandic lava tubes are a neat natural phenomenum. You can find more info about lava tubes here.
They are caves that have been made from past volcanic eruptions, as you can imagine there are MANY throughout Iceland. They vary in size (as you’ll see in a later post, one is ginormous!) and make for great stops on day trips to check out.
This one is acutallly located on the way to The Blue Lagoon and was close to the base in Keflavik. It was our first lava tube experiance.