Ancestral Puebloan ruins, natural arches, and box canyons abound in this seldom-visited corner of Monument Valley Navajo Tribal Park.

Dramatic river bend surrounds a natural red-rocked pedestal.

Most-visited and most-photographed slot canyon in the American Southwest.

A serpentine highway twists and turns over the treacherous Norwegian Sea.

This "preacher's pulpit" once used for pagan ritual, is home to a new, and dangerous ritual.

This giant boulder is pinched over a 1000-meter abyss by two mountains.

One man's exploration of the human form, including the bizarre and delightful "Man Attacked by Babies."

Oslo's historic toboggan run has been letting thrill seekers slide from train stop to train stop for over a century.

Walk 2,300 feet above the ground on the "Troll's Tongue."

One of the most breathtaking railways in Europe also takes one of the steepest climbs, from fjord to mountain plateau.

Longest road tunnel in the world features an air treatment plant and the illusion of daylight.

A thin pane of glass keeps visitors from sliding off this futuristic skywalk.

A part of the world's largest marsh seems to be growing bright red Martian grass.

The highest monastery in the world operates a tiny guesthouse with doors open to all.

One of the largest Buddhist stupas in the world keeps an eye out in every direction.

Nailing a coin to this holy stump is just another way to ask the gods for relief from dental pain.

Sacred Buddhist home of some spiritual monkeys.

Named after the Goddess of Harvests, Annapurna is the deadliest member of the Eight-thousanders club.