From mining complex to industrial exhibition, this museum once played a major part in the X-Files.

Railways may have forged this quintet of lovely tunnels, but now they are open to hikers.

This beautiful system of tunnels built into natural rock serves as a centuries old plumbing system.

Five sultans and their families rest in eternal splendor, teeming with overlooked beauty and drama.

Once a menacing challenge for trailblazers, this trail is now the most scenic drive in Utah.

Booker T. Washington's home at the Tuskegee Institute was a gem of splendor.

This entire town moved to a safe location after it was devastated by an earthquake, but the remains of the original town are still around.

This beautiful eden was once the vacation home of Tahitian royals before Marlon Brando bought it.

This lost city belongs to one of the earliest civilizations in the world.

This massive Brazilian church is built like an angular, technicolor pyramid left by Mayans from the future.

Spanish religion mixed with local architecture has yielded a network of churches unlike any other.

This stunning concert hall has become a symbol of Iceland's national recovery.

Located in the thermoelectric factory that once powered the entire city, this Portuguese museum is shockingly fascinating.

The world's longest covered bridge is a quaint and incredible wooden tunnel.

These locks on North America’s oldest canal are named after a porcine rock formation.

This 16th-century monastery has been turned into a surrealist architecture compound.

The oldest restaurant in the world is this old-world Spanish eatery, still known for its suckling pig.

This Vietnamese hell cave lets visitors take a walk through a devilish underworld full of demons.

Tour the sci-fi-esque reality of governmental disease management.

This massive Trojan ursine was built to be a new tourist symbol for a small Swedish town.

What remains of the summer palace of King Kamehameha III.

A railroad tunnel that, upon its completion, was considered one of the engineering marvels of the modern world.

Natural stone arches form a walkable "cathedral" at low tide, then disappear entirely when the water returns.

This Route 66 classic sports a giant fiberglass rabbit that you can ride.