Made up of 3,200 recycled glass bottles, this tree pays homage to Asturia's love of cider.

This enchanting green space houses a labyrinth lined with toxic plants.

This modern sculpture looks out over the sea and amplifies sound from the inside.

A statue honoring the tragic heroine of a Spanish literary masterpiece.

The much-loved protagonist of famed Argentinian comics can be found sitting on a park bench.

The surviving remnants of a destroyed medieval church now stand in a public park.

An Antoni Gaudí masterpiece in Astorga.

This amazing cathedral was built on the site of the first Marian shrine in Spain and is important to Spanish speakers the world over

Europe's largest river aquarium features freshwater species from around the world.

This 11th-century fortress is now the seat of Aragon’s state legislature.

There is a strange little carving of a person seemingly crushed by a pillar behind the remains of St. Thomas Aquinas.

This saucy statue once caused outrage among locals.

An Orthodox church built by the Royal Family for the Russian community exiled to the French Riviera.

This massive blockhead sculpture hides an entire library.

According to a local legend, this bridge was constructed by an astrologer with the help of the devil.

These pillars at the main entrance of this church are actually a hidden musical instrument.

The ruins of this medieval castle overlook the lake of Piediluco in what was once a sacred forest.

A map of Italy made entirely of trees.

The giant skeleton sculpture is surprisingly well-traveled.

This medieval mountain town is also known as the "Village of Streams."

Eighteen mummies have stood guard behind the altar of this tiny church since 1833.

This 2,000-year-old Doric bridge is still open to pedestrian traffic to this day.

Architectural monsters are devouring this palace's every door and window.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.