A fountain standing as a testament to a doomed alliance.

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

One of the newest mosques in a city filled with thousands.

This half-forgotten fortress was constructed by the Ottoman conqueror of Constantinople.

Hundreds of secret cabinets built into the walls of legendary poisoner's private work room.

The vibrant buildings in the “capital of the comic strip” celebrate the art form that made it famous.

People have been living in the cave houses on this Italian hillside since the Neolithic era.

A long-buried ancient ruin unearthed right in the middle of the city.

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

Southern Italy's spinning top village.

Macabre symbols of death and mummies on display set the tone of this Italian purgatory church.

These small, triangular, colorful houses are a staple of Madeira Island.

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

A collection of old neon signs from all over Poland line a secluded courtyard.

Despite attempts by local police to discourage it, Beatles-inspired graffiti has been a means for artists to air grievances for decades.

The first museum in the world devoted to sexual gadgetry.

What looks like a suicide in progress is actually a statue of Sigmund Freud.

Looming communist pillar with a Czech twist.

An ancient knight and a symbol of the city's freedom.

A tiny church on a man-made island in the Adriatic.

Former military fort and site of untold horrors during WWII, this island may become the Adriatic's next luxury resort.

This exclusive resort has completely covered a tiny Balkan island in a 5-star warren of guest rooms.

These historic defenses ensured the city within would survive hundreds of years of occupations, sieges, and invasions.

Baroque celebration of the end of the Great Plague of Vienna.