A stunning 18th-century site where pilgrims ascend by a series of punishing stairs only to return via funicular.

Hidden in plain sight, this creepy sculpture watches from above.

A collection of huge Pre-Colombian structures in Alabama.

This Peruvian bone silo lined with hanging human skeletons and hundreds of skulls is topped with a remarkable Michelangelo replica.

This huge concrete map of Scotland was built as a thank you gift from a Polish soldier.

This remarkable checkered church on a Corsican hilltop is fabled to have been built by angels.

The ruins of this gorgeous clifftop castle look like something from a fantasy novel.

This fairy-tale castle would make Dracula (who is said to have been imprisoned there) jealous.

This historic headstone is said to mark the final resting place of a doubly-dead white witch.

A sparkling sandstone cliffside that's worth a visit while it still exists.

This Corsican Neolithic site is full of pre-Roman megalithic structures that may or may not be penises.

This historic tower in the California desert promises visitors a "vortex of good vibes".

Semi-recognized center of the world, with many oddities.

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

The largest dune field in the Mojave offers a chance of hearing the 'singing sands.'

A museum and tribute to a brave profession.

One of the world's largest telescopes, stares into the night sky with two huge mirrors.

Ancient human, animal, and geometric figures drawn in the earth.

A motel dedicated to Southwestern nostalgia.

A $100,000 tumbleweed decorates an Arizona park and ride that got its priorities a bit tangled.

This collection of Wild West movie memorabilia also claims to hold some secrets of the Lost Dutchman's mine.

This immigrant bridge once spanned the Thames but is now a fixture of an Arizona city.

This abandoned horse racing track was an exercise in hubris from its inception.

An urban laboratory.