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

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

The atmospheric ruins of a historic church can be found on a hill above the city of Oviedo.

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

Two large posteriors in one giant statue.

Thanks to an acoustic anomaly, this unassuming stone bench has heard one hundred years of secrets.

Natural stone arches form a walkable "cathedral" at low tide, then disappear entirely when the water returns.

This enormous censer uses a pulley system installed over 400 years ago.

A road that winds through this natural cave is the only way to access the small, appropriately-named village of Cuevas.

A historic Christian shrine nestled within a spectacular natural cave.

The walls of these four caverns are filled with art that dates back to the earliest human presence in Europe.

Two towns are linked by an engineering marvel masquerading as a boring suspension bridge.

Giant topiary dog once played a role in a terrorist bomb plot.

Marvel at this immense work of art that greets arrivals to the city.

This 600-year-old home seems to defy physics.

An industrial relic is now one of Europe's most staggering art spaces.

The Bauhaus-style former industrial complex is considered the world's most beautiful coal mine.

These tenacious 14th-century towers defied demolition and are now a fairytale vacation rental.

This former steel and coal plant is now a neon-lit industrial fantasia.

No need to strap in for a "ride" on this walkable roller coaster.

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

Take a walk in a recreation of ancient Rome.

This futuristic German television spire is actually the world's largest digital clock.

This concrete church spent a period of its history as a World War II bunker.