Complete 2-day hike

Rhyolite mountains streaked orange, green and pink, with a natural hot river to soak in after the walk — the start of the Laugavegur trail.

Camel trek to towering Erg Chebbi dunes.

The "King’s Trail" through Swedish Lapland, past Kebnekaise and Sarek.

Visit Marcahuasi, a 4,000 m plateau of giant stone faces that stare back

A 165-km, ten-day wilderness trail from the ice sheet to the coast with huts, reindeer and no roads.

Turquoise alpine lake at 3,560 m, the classic Karakol trek.

Granite valleys, Turtle Rock and ger camps an hour from Ulaanbaatar — horse-riding country.

Turquoise lakes among sharp peaks.