The ceiling of Prohodna Cave in northern Bulgaria affords a peek at the sky via two deity-sized-eye-shaped holes.

Gigantic mosaic sculptures of the figures on Tarot cards fill this colorful Tuscan garden.

This gruesome biblical parade celebrates the one day a year that a bit of Jesus' blood turns to liquid.

The bronzed skull of a beheaded traitor was affixed to the city gate in the 17th century.

Christ's blood preserved in a Belgian town.

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.

A little sculpture with a large wardrobe.

Brussels' favorite peeing boy has a sister.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Each time a baby is born in Ghent, these streetlights flash in silent celebration.

Haunting monument to the German Jewish philosopher who died while fleeing fascism.

Giant eggs, walls of bread, and nightmare surreality mark the largest collection of works by Salvador Dalí.

These fly sculptures are scattered around the city and represent the patron saint of Girona.

A Romanesque tower appears when water levels drop.

Holy Grotto of Montserrat Monastery holds one of Europe's mysterious black Madonnas.

An eclectic collection of thousands of items owned by the sculptor Frederic Marès.

Climb a steep hill in 90 seconds on the second-oldest urban subway in the world.

A fountain standing as a testament to a doomed alliance.

This cafe offers a curated collection of treats and tipples made by monks and nuns.

The world's largest reflecting pool is just two centimeters deep.

Fighting the British and making game shows for over 150 years.

Historic medieval fortified city in southwest France.

A monument to the three wars that led to German unification towers within a Berlin traffic circle.