This mosaic-lined medieval church was built by the world's first admiral and still holds mass in ancient Greek.

Thousands of well-dressed mummies below a monastery.

Behind medieval walls in a corner of bustling Palermo is a breathtaking former mosque once inhabited by a wolf-taming hermit.

Leveled by an earthquake, this Italian village is now preserved as a massive concrete art project.

The pile of books behind the dignified writer gave the statue a most undignified nickname.

Dublin's most modern, visually spectacular bridge is modeled after Ireland's national emblem.

Stare out over the lagoon and beyond from this 10th-century campanile on the island where the city of Venice began.

A fantastical bed and breakfast with magically unique rooms.

A monument to the three wars that led to German unification towers within a Berlin traffic circle.

This quiet, unassuming spot in Budapest was the birthplace of the bloody 1956 Hungarian Revolution.

Climb a set of vertiginous stone steps to the top of this impressive ancient edifice.

One of Amsterdam's narrowest houses is located right across the canal from its widest.

A plaque marks the spot where the saint was shoved off the Charles Bridge and into the river.

A series of three shiny letters mark the boundary of an old refuge for those being pursued by debt collectors.

Cavemen, elephants, and eagles greet passengers driving through the town's main intersection.

The walls and streets of the ancient city are peppered with penises.

Old ships and machinery fill a historic harbor in the city that's home to Europe's largest port.

Ivy-covered Medieval tunnels cut through this charming town in France's Loire Valley.

Thousand-year-old Viking runes adorn an ancient Greek lion at the entrance to the Venetian Arsenal.

This exceptionally well-preserved ancient marvel also houses a small museum dedicated to Jordanian folk tradition.

Hanging within this medieval church are the bones of a beast allegedly slain by a fourth-century saint.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

Volcanic rocks ground down into sand make this Spanish beach as black as night.

This mountaintop observatory is home to one of the world's largest reflective telescopes.