The oldest still-inhabited hill fort in India looks like a magnificent golden sandcastle.

An ancient iron pillar in Delhi that seems to be rustproof.

Wedding chapel's mysterious spiral staircase said to be miraculously constructed.

This public square capitalized on a single Eagles reference to bring some life back to an Arizona town.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

A grove of colossal man-made flowers built to collect the sun's rays.

A modernist landscape of water and sci-fi concrete.

This ultra-modern California span is actually a titanic solar clock in disguise built by famed architect Santiago Calatrava.

A man-made island in scenic San Francisco Bay.

This famous bridge twisted itself into oblivion, but not for the reason you might think.

A wall of chewing gum moonlights as collective art.

The largest island on the great salt lake is home to curious creatures and strange stories.

Two mammoth statues inspired by equally tall tales lure tourists to this roadside attraction.

Only known mainland rookery of the threatened Stellar sea lion.

The first North American landing spot for James Cook on his third voyage of discovery in the Pacific.

The longest continuous lava tube in Oregon.

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

Bridges, terraces, and replicas of historic structures all built of rock and petrified wood by one man.

While it is not equipped to peer into outer space this observatory looks like it was built on the moon.

The first spinning jail built in the United States is the only one that still turns.

A flamboyantly decorated bridge signals diversity and fellowship at the entry to Indianapolis' Broad Ripple Village.

The body of one of the world's most famous outlaws is covered in cement and iron to prevent it from being stolen.

A 30-year-old Sycamore tree grown from a seed taken to the moon and back.