Tree Tunnel, Sena de Luna, Spain

Hole in the Wall, South Africa

Iguazu waterfalls, between Argentina and Brazil

The coastline of Lake Urmia, in Iran.

CRYSTAL CAVE Svínafellsjökull Skaftafell, Iceland

The Moeraki Boulders of New Zealand.

Zlatibor, Serbia

Santorini, Greece

Twin Lakes, Denver Colorado

Bungle Bungles, Western Australia

Confluence of the Rhone and Arve Rivers in Geneva, Switzerland

Turquoise ice at Lake Baikal, by Alexey Trofimov

Stingray Bay