Liechtensteinklamm — The Helix Chasm

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.

It is remarkably rare for a major European capital to have a pristine expanse of ancient primeval forest just 20 kilometers from the city center. Tyresta National Park is Stockholm's wilderness backyard. The premier hike is the purple-blazed Tyrestarundan (The Tyresta Circuit), a 14km (8.7-mile) loop that functions as a highlight reel of Swedish nature. The trail takes hikers through dark, moss-draped ancient pine forests (with trees over 400 years old), past three distinct glass-like lakes, and directly through the stark, silver skeletons of the 1999 forest fire zone. It is immaculately maintained, featuring fire pits with supplied wood, making it the significant accessible day hike.