Climb Kolombangara

Four-day jungle trek to terraced ruins older than Machu Picchu.

The Osa Peninsula park National Geographic called the most biologically intense place on Earth — tapirs, scarlet macaws and all four Costa Rican monkeys.

Volcanic park of peaks and lakes, UNESCO-listed.

Patagonia’s granite towers, glacier lakes and the classic W trek.

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

Two-week trek up the Baltoro Glacier to the foot of the world’s second-highest peak.

Climb the vast flat-topped tepui.

Bosnia’s oldest park: Maglic, the country’s highest peak, and Perucica, one of Europe’s last primeval forests.