Southern France: Four Hikes above the Côte d'Azur - paulsmit
'Examples of karst.'

North of the Col de la Madone de Gorbio, the scene shifts from green and rich in flowers to dry and barren. The water as it seeps through has eaten away at the limestone, leaving behind razor-sharp fins. A textbook example of a ‘karst’ landscape. Photo Paul Smit.