Palais Claudio Bravo, Taroudant, Sous Valley, Morocco, North Africa, Africa

Hoover Dam wall, Boulder City, Nevada, United States of America, North America

Traditional dry stone wall, vertical sloping stones, in field in The Burren, County Clare, West of Ireland

Traditional dry stone wall in meadow in The Burren, County Clare, West of Ireland

Traditional dry stone wall in meadow in The Burren, County Clare, West of Ireland

Dry stone wall near Rosmuck, Connemara, County Galway, Ireland

Traditional dry stone wall in meadow in The Burren, County Clare, West of Ireland

Traditional dry stone wall, stones laid flat, in field in The Burren, County Clare, West of Ireland

A frozen Stickle Tarn with crack patterns in the ice, above the Langdale valley with Pavey Ark in the background, Lake District, Cumbria, England, United Kingdom, Europe

Oogawa Falls, Kagoshima Prefecture, Yakushima, Kagoshima Prefecture

Oogawa Falls, Kagoshima Prefecture, Yakushima, Kagoshima Prefecture

Barechested man climbing wall

Turbines inside the Hoover Dam near Las Vegas, Boulder City, historically Junction City, Nevada, USA, North America

View from the Hoover Dam Bypass Bridge to the dam wall of the Hoover Dam, Hoover Dam, Dam, near Las Vegas, Colorado River, Lake Mead, Boulder City, Arizona Border, Nevada, USA, North America

Turbines inside the Hoover Dam near Las Vegas, Boulder City, historically Junction City, Nevada, USA, North America

Senja Palonen bouldering under Gibbs Cave in the Apron Boulders below the Grand Wall. Squamish, British Columbia.

Bruce Miller climbs on the hardest part, or "crux", of a route called "Jules Verne", rated 5.11a, high off the ground on the Redgarden Wall in Eldorado Canyon State Park, CO. Jules Verne is one of the more famous traditional or "trad" routes in the area, and has long sections between protection. Eldorado Canyon, located on the Front Range south of Boulder, and its steep, difficult sandstone cliffs attract climbers from around the country and the world, making it one of the most popular climbing areas in Colorado.

Beth Rodden holds onto the prow of a boulder with aspen shadows visible on its face outside Estes Park, Colorado. Beth Rodden is one of the worlds leading climbers.

Bruce Miller climbs on the hardest part, or "crux", of a route called "Jules Verne", rated 5.11a, high off the ground on the Redgarden Wall in Eldorado Canyon State Park, CO. Jules Verne is one of the more famous traditional or "trad" routes in the area, and has long sections between protection. Eldorado Canyon, located on the Front Range south of Boulder, and its steep, difficult sandstone cliffs attract climbers from around the country and the world, making it one of the most popular climbing areas in Colorado.

Stone Ruins With Columns And A Boulder, Corinth, Greece

Proleek Dolmen, County Louth, Ireland, Near Ballymascanlan