The sunlight passing through the opening of this huge cave system creates a magical effect.

Southern Italy's spinning top village.

A 1,000-year-old church holds the bones of the Christian martyrs who died hiding inside it.

A long-buried ancient ruin unearthed right in the middle of the city.

A fascist-era rural village abandoned since the early 1980s.

A set of 27 bamboo tubes creates an eerie soundscape that changes with the wind.

This fairy tale forest hides scenes from some of the more obscure and bizarre Western nursery stories.

A whimsical bridge uses saxophones to pay tribute to two great men and the European Union.

Descend into the tunnels to experience the life of a coal miner.

This centuries-old gothic monster has been converted into a sprawling, glossy bookstore.

A once-magnificent collegiate church is falling into ruin.

A luxury hotel housed in a former 15th century Gothic church.

What was once a bustling mining installation is now a bustling hub of contemporary art.

A Museum of Psychiatry in a still-operating mental institution.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

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

A pilgrimage site where people ask Saint Dymphna to watch over those who are not of sound mind.

A giant bug impaled on a 75-foot-tall needle.

This whimsical statue dumps water on its head to symbolize knowledge flowing into his brain. Or maybe booze.

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

A little sculpture with a large wardrobe.

This collection of over 50 murals celebrates Brussels' rich history as the self-proclaimed home of the "comic strip."

Meet the bronze beloved pet to a family of famous peeing statues.

Brussels' favorite peeing boy has a sister.