“Mainly on fault lines of tectonic boundaries, where plates are pushed together or dragged apart, volcanoes occur. Cracks allow the magma to rise up to the surface where it erupts through a volcano. The caved-in surface on top of the volcano is called crater. The photo shows the phenomenal landscape of extinct craters in the highlands of Iceland.” 🌋📸by Tom Hegen (tomhegen.de) . . . . #potd #Iceland #craters #volcano #aerialshots #wow #naturelovers #adventure #travel #TomHegen