Morro Dois Irmãos (Two Brothers Hill)

Morro Dois Irmãos is one of Rio de Janeiro's most accessible and visually rewarding trails, linking the Vidigal community with a granite peak overlooking the South Zone. The route is defined by its social-geographic transition—starting with a local transport ride through a residential favela followed by a steep but relatively short ascent through the Atlantic Forest. Unlike the more technical and remote Pedra da Gávea, this hike is a staple for fit beginners and sunset observers, providing a definitive overview of Ipanema, Leblon, and the nearby Corcovado massif.

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.