At high tide this strange footbridge appears to have no purpose whatsoever.

Known as the leaning temple, the sacred structure has somehow developed a severe nine-degree slant.

A dreamy mausoleum honors Persia's most famous poet.

An abandoned railroad tunnel is now filled with bioluminescent bugs.

This 170-year-old Swiss guesthouse built into the side of a mountain is best accessed by a cable car.

This magical space partly designed by Antoni Gaudi is one of the best examples of romantic gardening in the Mediterranean.

A galaxy of glowworms—larvae of a gnat—hides deep in the belly of these caves.

This candy shop has been serving up sweets to the Louisville area since the 1850s.

This pseudo-steampunk weapons facility is the world's largest wood and glue structure, and packs quite a wallop.

Twenty-seven massive radio antennas on the high plains of New Mexico search for life on other planets.

A phenomenal assembly of pueblos in New Mexico is the most complete example of ancient ruins north of the border.

Legends surround this jagged rock formation in the New Mexico desert.

A clear blue swimming hole with hidden caves, still unexplored.

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

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

An immersive art experience built by local arts collaborative, Factory Obscura, in the building formerly known as The Womb, a psychedelic arts center founded by the frontman of the Flaming Lips.

It's big, it's a ball, and it's made of twine—the world's largest of its kind.

Massive still life just off the highway in Kansas.

A unique attraction and museum dedicated to exploring iconic roadside structures.

A 35-foot-tall fork stuck in the ground outside an office building in Missouri.

Four, 18-foot-tall badminton shuttlecocks lie scattered about the lawn of a Kansas City museum.

The world's second largest rocking chair is found on Route 66 in Cuba... Missouri.

The "World's Largest Underground Business Complex," a 55,000,000-square-foot city underneath Missouri.

Erosion and time have created a naturally-formed water park.