Devils Tower is a monolith that rises to a height of 1,267 feet and featured prominently in the Steven Spielberg film Close Encounters of the Third Kind (where it was reproduced in mashed potato). Thanks: xylon, Sally, many others.

It hasn’t erupted since 1980 March 2005, but apparently Mount St Helens still counts as an active volcano. Not great resolution here yet though. Thanks: Sean Miller, kb and others.

The world’s largest natural bridge. The surrounding landscape is very surreal, it all looks like it is sculpted out of play dough. Thanks Jeff Reynolds.

The Uffington White Horse in Juarez Mexico is over half a mile long. Hey cool, we have these in the UK aswell. Thanks jesvs.

Gorgeous views of the California coast. If only I could be on that beach right now; drinking a cold one, catching some waves… Thank Shital Shah

Not all of Honolulu is hi-res yet, but check out Diamond Head State Monument, which appears to be, er… inside an old volcano?