Here, at the "world's longest art gallery," you'll find forty miles of ancient petroglyphs and pictographs.

Stroll through a wonderland of stupendous moss-covered trees.

Hellam Township is reputed to feature seven remote gates, which when passed through in the right order, open an entrance to hell.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

This massive library holds what was once the largest book collection in the world.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

Abandoned railway line circling the city of Paris.

Crystal clear lake with a shoreline of travertine located in a Colorado canyon.

This dramatic landscape hidden on the Isle of Skye looks as though you've stepped into the magical realm.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

France's most famous cemetery, with some of its most curious tombs.

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

Dramatic river bend surrounds a natural red-rocked pedestal.

These fantastically named natural pools look like something out of a Scottish myth.

The mysterious, fantastical woodland inspiration for "The Lord of the Rings."

The sound of swaying stalks in this stunning grove has been named a governmentally recognized sound.

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

Rippling sand dunes frozen in the Arizona rock.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.