Leveled by an earthquake, this Italian village is now preserved as a massive concrete art project.

A study of Fascist era Art Deco design in Italy.

Why a column on the entrance is inscribed with a verse from the Quran is one of Sicily's many mysteries.

This Arabesque Italian castle was built with a primitive, if ingenious, air-conditioning system.

Haunting graffiti left by prisoners of the Spanish Inquisition.

Every inch of this chapel is covered in craftsmanship from across the world.

Cave shrine on Monte Pellegrino.

Invisible bridge parts the waters, invoking biblical images and preserving the ominous feel of an ancient moat.

A maze of crosses marks the jumbled divide between the Netherlands and Belgium.

This bike path traverses the treetops.

This bike path was sunk below water level for maximum wonder.

Part modern art project, part traditional chapel, this see-through church is only substantial from the right angle.

The tiny Belgian town's ancient version of Mardi Gras involves eerie wax masks, sticks for warding off evil, and ostrich plume hats.

This narrow Ghent alleyway is an officially sanctioned street art tunnel.

A collection of weird and wonderful art fills a former houseplant nursery.

The vast chamber inside this abandoned cooling tower looks like something out of a sci-fi dystopia.

Somewhere there is a giant who can no longer poop, but now travelers can stay inside his anus.

This impressive collection of skulls and bones was gathered by an ex-zookeeper who took advantage of a pig plague.

The patron of this extravagant Art Nouveau confection insisted that nothing less than a boat should project from its facade.

Ancient man-made caves underneath small town Belgium.

One of Belgium's oldest hospitals saw patients from the 13th to 20th centuries before becoming a museum.

The "stairway to heaven" lookout tower was built to resist weather, arson, and the laws of physics.

A fascinating and enormous collection of natural history exhibits stained by a dark colonial legacy.

One of the deepest indoor swimming pools in the world.