Morro Dois Irmãos

This guide to Morro Dois Irmãos in Rio starts not on a forest trail but inside Vidigal, the hillside favela where the climb begins, and traces how a neighborhood once considered off-limits became welcoming to hikers after Rio's Pacifying Police Unit moved in in 2012. It follows the roughly one-and-a-half-kilometer climb through Atlantic rainforest before the trees give way to bare rock. Guides along the way warn newcomers to watch their footing on the exposed final stretch.