It was once used as a classroom to teach mining skills to local high school students.

After years of being casually peed on by humans, this tree is peeing back.

Ever needed a chocolate-filled crepe in the wee hours of the morning?

This fascinating museum in an old water tower holds the world's largest collection of Vodou artifacts from western and central Africa.

This retro underwater observation tower would make the perfect lair for a sea-loving villain.

A medieval, mosaic-lined baptistry built by a heretical Christian sect.

This legendary urban waterfall creates a dazzling display of rainbows.

An unassuming Swiss institution houses Europe's largest toy museum.

This anatomical sculpture raises awareness about violence against women and promotes gender equality.

This enormous banquet-themed artwork honors over 1,000 notable women throughout history.

An interactive exhibition space dedicated to the kinetic sculptures of Swiss artist Jean Tinguely.

In medieval times this small stone seat was used as a bizarre way to punish insolvent debtors.

A 2,000-year-old engineering wonder hides beneath an Italian town.

A Saxony castle houses one of the largest and most outstanding mineral collections in the world.

This hidden bridge is where local children leave gifts and messages for the island's fay folk.

The plunge pool is a surviving relic of a rowdy royal residence.

A relic of Victorian grandeur hides beneath a busy South London road.

Legend says this mysterious stone head belongs to a woman who was petrified by an alchemist.

The graffitied ruins stand hidden within the Pennsylvania woods.

Colloquially known as “piss alley,” this narrow street filled with tiny bars and barbecue stands looks like it was pulled straight out of “Blade Runner.”

The first, and perhaps only, monument dedicated to Wikipedia.

The graveyard is filled with beautiful funerary art and boasts breathtaking views of Florence.

The hidden ruins of an old hydroelectric plant reclaimed by nature.

Legend says these colorful, invasive residents are the descendants of birds released by Jimi Hendrix.