26. Itaimbezinho Canyon, Brazil

This canyon has been here for over 130 million years. It is found near Porto Alegre in the beautiful Aparados da Serra National Park. It features steep walls and lush, native pines. Hike the Trilha do Vértice or the 6.3 kilometer (four-mile) long Cotovelo. The best time to visit during Brazil’s winter from May through August.

27. Antelope Canyon, USA

Ensconced in Arizona, Antelope Canyon has swirling sandstone walls and an upper and lower section. The best time to visit both areas is either in the late afternoon or early morning when the views of the red rock here are the most impressive. Being part of the Navajo Nation you can only visit here as part of a guided tour.