Visit the Tundavala Gap

Famous hairpin mountain road plunging off the Huila plateau.

Eroded "moon landscape" near the coast.

One of the largest green canyons on Earth, seen from God’s Window and the Three Rondavels viewpoints.

Striped desert canyon walls.

The El Chepe train climbs 2,400 metres through 86 tunnels and 37 bridges across a canyon system deeper than the Grand Canyon.

Oman's highest peak and grand canyon.

Four hours drifting past the karst peaks on the back of the 20-yuan note, with cormorant fishermen and water buffalo on the banks.

Two-stage cable car to Rio’s granite icon and its harbour-wide views.