Visitor at Painted Wall View Point, Gunnison River deep in the canyon, Black Canyon of the Gunnison National Park, Colorado, United States of America, North America

Gunnison River deep in the canyon from Kneeling Camel View Point, Black Canyon of the Gunnison National Park, Colorado, United States of America, North America

Black Canyon of the Gunnison National Park, Gunnison River deep in the canyon, Colorado, United States of America, North America

Divide between Canyon del Muerto and Black Rock Canyon, Antelope House Overlook, Canyon de Chelly National Monument, Arizona, United States of America, North America

Black Canyon of the Gunnison National Park, Gunnison River deep in the canyon, Colorado, United States of America, North America

Saklikent Gorge, near Fethiye, Mugla Province, Lycia, Mediterranean Coast, Southwest Turkey, Anatolia, Turkey, Asia Minor, Eurasia

Black Canyon of the Gunnison National Park, Gunnison River deep in the canyon, Colorado, United States of America, North America

East view of Canyon De Chelly National Monument North Rim from Antelope House Overlook, left fork leads to Many Cherry Canyon, right fork to Black Rock Canyon, Arizona, United States of America, North America

Stuolagil Canyon, turquoise river between basalt columns, Egilsstadir, Iceland, Europe

Tourist standing by the river in Stuolagil Canyon, turquoise blue river between basalt columns, Egilsstadir, Iceland, Europe

Stuolagil Canyon, turquoise river between basalt columns, Egilsstadir, Iceland, Europe

Hikers in river, The Narrows, Virgin River, steep walls, Zion Canyon, Zion National Park, Utah, USA, North America

Gertelbachwasserfaelle water falls, Gertelbachschlucht gorge, Buehl, Buehlertal valley, Black Forest, Baden-Wuerttemberg, Germany, Europe

Hikers, Moss covered rocks and waterfall, Wutach gorge, Bonndorf, Baden-Wuerttemberg, Black Forest, Germany, Europe

Basalt columns in Stuolagil Canyon, Egilsstaoir, Austurland, Iceland, Europe

Gertelbach brook, Gertelbachschlucht gorge, Buehl, Buehlertal valley, Black Forest, Baden-Wuerttemberg, Germany, Europe

Lierbach river at the Allerheiligenwasserfaelle, All Saints' Waterfalls, Oppenau, Black Forest, Baden-Wuerttemberg, Germany, Europe

Stairway at the Lierbach waterfalls, Black Forest, Baden-Wuerttemberg, Germany, Europe

Shannon Black, silhouetted against the sky, rapells the overhanging face of Gibraltar Rock in Santa Barbara, California on January 18, 2003. The view looks south over Rattlesnake Canyon to the Pacific Ocean beyond. (Photo by Kevin Steele, Aurora)