A climber is lowered from a the edge of a huge cave in the Mascun Gorge, near Rodellar, Sierra de Guara mountains, northern Spain, Europe

A climber tackles a severely overhanging route in the caves of the Mascun Gorge, Sierra de Guara mountains, Aragon, Spain

Woman hiking in the Mascun Gorge, one of Europe's most popular canyoning destinations, Sierra de Guara mountains, Aragon, Spain

Climber makes her way up one of the rock faces of the celebrated Mascun Gorge, Sierra de Guara mountains, Aragon, Spain

Woman hiking in the Mascun Gorge, one of Europe's most popular canyoning destinations, Sierra de Guara mountains, Aragon, Spain

A climber on a route along the arch of El Delphin (The Dolphin) in the Mascun Gorge, Sierra de Guara mountains, Aragon, Spain