Leiðarendi Lava Cave
Leiðarendi was formed by two separate eruptions one two thousand years ago, the other one thousand years ago. During each, rivers of lava slowly cooled from the outside as they travelled from their erupting craters. A hard rock shell formed over the molten liquid, and as this flushed out, a hollow tube was left. At some point the two caves collapsed into each other, leaving a circular path with a few hidden chambers. Inside is filled with incredibly diverse and colourful scenery and is considered a prime example of an Icelandic lava tube. The kaleidoscope of colour comes from the minerals brought up in an eruption, with the red from iron, the yellow from sulfur, and the green from copper. Because of the dangers of lava caves, they should only be visited with a guide on a sanctioned tour. (Hafnarfjordur, Iceland)
