South Window Arch, part of Arches National Park, Utah, frames Turret Arch. Hikers on the left put the enormous, erosion-carved arches in perspective! Although Edward Abbey worked at 16 national parks, Arches National Park is most associated with the controversial environmentalist. His time working as ranger in Arches inspired his collection of essays, Desert Solitare: A Season in the Wilderness.
Photograph by Bruce Dale, National Geographic