A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

Dyed by iron oxide over centuries, these sandstone rocks rise thousands of feet into the sky.

Named for the DeFoe novel inspired by a stranded sailor, this island is known for its rare plants and extreme beauty.

Friction between grains of sand cause a curious "singing" sound.

Rocky Atlantic beach home to a stunning stone arch.

One of the most unusual geological features, recognizable from a dozen hit movies.

An unoccupied lighthouse encased in layers of ice from the waters of Lake Erie.

Largest site of dinosaur footprints ever found includes more than 5,000 tracks.

An ancient stone fortress considered by many to be the eighth wonder of the world.

At 8,000 feet, the world's highest tea estate draws visitors for both its products and its panoramic views.

Mineral springs believed to hold therapeutic properties draw in visitors from all over.

Sloth rehabilitation center in the jungle of Costa Rica.

This sacred cavern, 400 feet deep, is home to millions of bats and an ancient burial ground.

Perfectly preserved ancient monastery in an impossibly dramatic location on a rocky island in the Atlantic.

Old and brave breed of warhorses known for their elegant, curved ears.

Stroll through a wonderland of stupendous moss-covered trees.

This one-time health resort was used by aristocrats around the world.

Canyon walls shrouded in ferns.

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

This 1,500-acre development hopes to be the Central Park of the South.

World's strongest whirlpool.

A natural tidal swimming pool is ringed by bizarrely artistic lava rock formations.

270 million year-old forest of stone.

Surat Thani's official flower—and the world's largest—smells of rotting meat.