Kīlauea Iki Trail

The Kīlauea Iki Trail on the Big Island of Hawaii offers an otherworldly experience: the chance to hike directly across a solidified, still-steaming lava lake inside a volcanic crater. In 1959, this crater erupted sustainedly, shooting fountains of lava 1,900 feet into the air and filling the basin with a fiery lake. Today, the surface has crusted over into a jagged floor of jet-black 'pahoehoe' (smooth) and 'a'a' (sharp) lava rock. The hike begins in a dense, lush, tropical rainforest of native ohia trees and giant hapu'u tree ferns along the crater's rim before plunging 400 feet down the steep walls. Hikers then follow a path marked by stone cairns ('ahu') directly across the desolate, cracked, steaming expanse of the crater floor, walking over active volcanic vents.

The Ravensburger Hütte (1,948m) is a high-altitude sanctuary in the Lechquellen Mountains. Starting from the turquoise Spullersee—a high-alpine reservoir—the trail offers a relatively gentle approach to a classic Austrian Alpine Club (DAV/AV) hut. The scenery is dominated by the 'Rote Wand' (Red Wall), a massive limestone face that glows deep amber at sunset. The area is a labyrinth of karst formations and lush meadows, perfect for spotting marmots and experiencing the quiet side of the Arlberg.