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.

Two large posteriors in one giant statue.

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.

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

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

A Christian retreat founded to welcome refugees fleeing from the Nazis during World War II.

Unable to build support structures on glaciers, the engineers for this tramway were forced to design a unique system.

Picturesque basketball courts sheltered by historical defensive walls and with an enviable sea view.

The alleged house of the Virgin Mary is tucked away in a park and nature preserve on Mt. Koressos in Turkey and is holy to both Catholics and Muslims alike.

The world's first and only escalator for lazy bicycles and their daunted riders.

The castle was reconstructed to fit Kaiser Wilhelm II's romanticized vision of the Middle Ages.

Beneath the city of Lourdes, France is a massive, concrete church.

This modern museum of Mediterranean culture is surrounded by a surreal concrete honeycomb.

Hundreds of hidden passageways weave through the old quarters of Lyon.

Its town washed away centuries ago, this lonely tower by the sea tells the tale of a mermaid and a curse.

An image of the legendary saint stands in the shadow of a cathedral she liberated.

A set of 27 bamboo tubes creates an eerie soundscape that changes with the wind.

Watch the local Netherlands birds from inside this giant eco-egg.

Peek through a transparent pyramid and drink in the mountain made of books.

A quaint medieval harbour where Benjamin Franklin landed in 1776.

Hundreds of prehistoric stones, arranged in perfect lines in a French field.

A set of parking garage escalators doubling as a historical overview of Rotterdam.