Trips over ice to the North Pole may be impossible in summer in just a decade or two because of global warming, says one of the world's leading polar adventurers.

Rob McFarland finds big boys really do cry - at the summit of Wayna Picchu in the Andes.

Claire Trevett saddles up and travels from Rawene to Pouto Point the old-fashioned way.

Ulrike Koltermann ventures off the beaten track to scale Tanzania's second-highest peak.