Colca Canyon (Cabanaconde to Sangalle)

Descending into the earth's crust. Colca Canyon is one of the deepest canyons in the world (3,400m). The classic trek starts in the high Andean town of Cabanaconde (3,280m) and involves a rapid, knee-jarring descent to the Colca River. Hikers pass through traditional Quechua villages where pre-Inca terraces are still active, before reaching the Sangalle Oasis—a lush, green sanctuary at the canyon floor. The return journey is an infamous pre-dawn 1,200m vertical climb that tests the lungs and legs of every hiker. Above, the sky is often filled with the massive silhouettes of Andean Condors, utilizing the morning thermals to rise out of the canyon's depths.

One of the longest, deepest, and most impressive gorges in the Alps. The Liechtensteinklamm is famous for its narrow walls that are so close they almost block out the sky. Following a massive rockfall in 2017, the gorge was upgraded with the 'Helix'—a spectacular spiral staircase made of corten steel that descends 30 meters into the depths of the chasm. The path leads over bridges and through tunnels to a massive 50-meter waterfall at the end of the walkable section.