This underground church is topped with a 500-foot cross that is seen by many as a beacon of fascist hubris.

Vibrant street art created with mixed media.

Spain's unique Mosque-Cathedral has been a place of worship for both Muslims and Christians throughout its history.

Devastated landscape used for hundreds of years by the Romans as their primary mining site.

The facade of this 16th-century building is decorated with carvings of 300 seashells.

An unusual but excellent display created in the 1930s as propaganda against the Freemasons.

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

This beautiful spit of land was once the summer playground of the king of Spain.

Vienna's giant wonder wheel had a starring role in one of the greatest noir movies of all time.

Thanks to modern navigational tools we now know that the true prime meridian runs through a park next door.

Pilgrimage site for star-crossed lovers.

Lie in a hammock where George Washington stood.

This trio of Australian rock spires may have inspired aboriginal legend or just modern tourism.

This interactive museum highlights the history and philosophy of one of the world's most difficult sailing races.

A well-restored ancient archaeology site gives a real feel for life during the Roman age.

This vast masterpiece of Moroccan architecture spreads across 20 acres.

This historic club for wayward boys has shaped some of the biggest names in music almost as much as they have shaped it.

A museum dedicated to one of Paris’s most famous residents, tucked into a corner of one of the city’s most famous squares.

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

This Grade II Listed Building with an Art Nouveau façade once contained a unique print shop.

A historic, reportedly haunted pub that provided inspiration for several famous adventure novels.

A medieval cave used to shelter local hermits now holds nearly 200 old Quaker gravestones.

No one knows who painted this mysterious mural in a Penn State basement.

Alexander Hamilton’s creation caused quite a bit of controversy.