Tourists walk past souvenir tee shirt stating I have climbed up the The Great Wall, in Mutianyu, north of Beijing

India. Pilgrimage to malayattoor, a hill which saint thomas the apostle is believed to have climbed around 55 ad, leaving his footprints at the top. It is a major pilgrim centre for christians as well as hindus and moslems, who believe the trip can cure them of physical and mental disease. Kerala. Statue of thomas in the lower church

India. Saint thomas baptising a brahmin in the periyar river. Pilgrimage to malayattoor, a hill which saint thomas the apostle is believed to have climbed around 55 ad, leaving his footprints at the top. It is a major pilgrim centre for christians as well as hindus and moslems, who believe the trip can cure them of physical and mental disease. Kerala

India. Pilgrimage to malayattoor, a hill which saint thomas the apostle is believed to have climbed around 55 ad, leaving his footprints at the top. It is a major pilgrim centre for christians as well as hindus and moslems, who believe the trip can cure them of physical and mental disease. Kerala. Statue of jesus in the lower church

India the peryar river, where thomas landed before climbing mount malayattoor. Pilgrimage to malayattoor, a hill which saint thomas the apostle is believed to have climbed around 55 ad, leaving his footprints at the top. It is a major pilgrim centre for christians as well as hindus and moslems, who believe the trip can cure them of physical and mental disease. Kerala

India. Faithfiul at a station of the cross during the pilgrimage to malayattoor, a hill which saint thomas the apostle is believed to have climbed around 55 ad, leaving his footprints at the top. It is a major pilgrim centre for christians as well as hindus and moslems, who believe the trip can cure them of physical and mental disease. Kerala

Tourists climbing Dune 45 in the Namib Desert, most likely the world's most photographed and climbed dune, in the evening, Namib-Naukluft National Park, Namibia, Africa

Kevin Jorgeson climbing "Fantasia" at Lover's Leap, a popular granite climbing destination near Lake Tahoe in California's Sierra Nevada mountains. The cliff is known for its distinct horizontal quartz dikes which make interesting climbing. This route is considered a risky mental test piece because of its lack of good cracks for protection. It was first climbed in 1973 by Royal Robbins and Ken Wilson.

Chris McNamara uses a sky hook to move higher while rock climbing Mescalito on El Capitan in Yosemite National Park, California. By the time McNamara was 18 years old he had rock climbed the 3000 foot high El Capitan more than 50 times. El Capitan is considered a big wall and usually requires aid climbing.

Tommy Caldwell rock climbs a crack on the headwall of The Salathe Wall 5.13 on El Capitan in Yosemite National Park, California. Caldwell is a professional rock climber and has free climbed more on El Capitan than any other climber.

Tommy Caldwell rock climbs a crack on the headwall of The Salathe Wall 5.13 on El Capitan in Yosemite National Park, California. Caldwell is a professional rock climber and has free climbed more on El Capitan than any other climber.

Tommy Caldwell rock climbs a crack on the headwall of The Salathe Wall 5.13 on El Capitan in Yosemite National Park, California. Caldwell is a professional rock climber and has free climbed more on El Capitan than any other climber.

Young Black Rat (Rattus rattus) climbed in a viburnum near a rural house, Auvergne, France.