An art deco ice cream shop covered in vintage train station tiles.

An abandoned relic of the city's failed experiment with below ground transit.

Self-built house and sculpture park where the creator can still be seen in a glass coffin.

A whimsical tower with a spiral staircase, inspired by the Space Age and the Möbius strip.

An immersive art experience built by local arts collaborative, Factory Obscura, in the building formerly known as The Womb, a psychedelic arts center founded by the frontman of the Flaming Lips.

The future of roadside attractions is this sci-fi soda mecca that is home to a 66-foot tall neon pop bottle.

Dummies recreate radiological discoveries from history.

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

Climb inside an iron crystal magnified 165 billion times its normal size.

The Bourbon royal family had this unique octagonal hunting "cottage" built on a tiny islet in Lake Fusaro.

Two planes stand abandoned after the closure of an aircraft-themed restaurant.

A line of abandoned, alien-like fortresses dot the mountains of North Italy.

Drink wine handed out through a window as part of an age-old tradition.

One of the world's oldest working clocks is curiously missing the Zodiac sign of Libra.

Abandoned for 60 years, this submerged bridge was completely forgotten until the lake was drained.

One man has spent decades faithfully constructing this unique brick and cinderblock castle.

Hidden in an Italian forest is a completely homemade amusement park that has taken a lifetime to create.

A labyrinth of ancient tunnels hidden below the city holds the ruins of 2,500 years of history.

This Italian foot path winds through the mountains via 52 individual tunnels.

Dug as a secret royal escape route, the tunnel became a wartime bomb shelter and dumping ground for vintage cars.

A star-shaped fortress town fort built in the geometric model of the Renaissance utopian city.

This shining multicolored metro station deep under Naples is said to be the most beautiful in Europe.

Venice's island of the dead.

This abandoned island off the Venetian coast has been a radical monastery, a political prison, and a secret Nazi base.