From marble caves to fairy chimneys, these are the world’s most impressive geological features.
Khara Salt Lake, Iran
Just over 100km from Esfahan, Varzaneh is possibly the only place where on approach you can see three natural phenomena together – sand dunes, shimmering in the sun, on the white surface of the salt lake, the wetlands and a volcanic mountain rising in the middle. The basalt volcanic mountain is climbable and views from the top are spectacular.
Danakil Depression, Ethiopia
Officially the hottest place in the world, and the lowest point on the African continent, the Danakil Depression, a volcanically hyperactive stretch of the northern Rift Valley, doesn’t conform to conventional notions of chocolate-box prettiness, but its stark scenic highlights include live lava lakes, sulphurous multi-hued geysers, and remote salt pans that have been mined for centuries by the hardy Afar people.