eirini reppa
More ideas from eirini
Fingels Cave in Scotland (apparently was misrepresented by name and location when I repinned it from another user.)

Hengill, Iceland - Hengill was formed from a Palagomite tuff, it is a central volcano and has a giant magma chamber beneath it. When thick basalt lava flows cool, they form hexagonal cracks, called columnar joints