Hardergrat — Interlaken to Brienzer Rothorn

Widely regarded as one of the most aesthetic and challenging ridge traverses in the world, the Hardergrat involves a relentless series of sharp grassy peaks that separate Lake Brienz from the Habkern Valley. The trail is often no more than 30cm wide, with 1,500m vertical drops into the turquoise water below on one side and steep gullies on the other. It is a test of sheer fitness, psychological fortitude (vertigo), and surefootedness. There are no bailout points once you are on the main ridge section; it is a commit-to-finish line.

The Larapinta Trail is a 223km point-to-point long-distance track in the Northern Territory, Australia. Spanning from the Alice Springs Telegraph Station to the summit of Mount Sonder, the route traverses the spine of the West MacDonnell Ranges (Tjoritja). The landscape is defined by Proterozoic-era quartzite ridges, narrow gorge systems, and ephemeral river beds. The trail possesses deep cultural significance to the Arrernte people and offers exposure to one of the world's oldest geological landscapes.