Ernest Hemingway was the first to sign this colorful wall covered in thousands of celebrity signatures.

Claude Monet immortalized this medieval bridge in two of his paintings.

This giant middle finger statue sends an unambiguous message to Italy's bankers.

See what remains of a once grand ancient Roman circus.

Old batteries and frog skeletons reside in this lakeside monument to Alessandro Volta.

This 6th-century church has the largest and best-preserved collection of Byzantine mosaics outside Constantinople.

Italian poet Dante Alighieri is entombed in this small mausoleum in Ravenna, and his hometown of Florence has never been too happy about it.

Psychoanalyst Carl Jung reported a paranormal experience after visiting this mosaic-lined Roman baptistry.

Filled with goldfish swimming in a shallow pool of sea water, this ancient crypt is more wishing well than burial site.

This shining multicolored metro station deep under Naples is said to be the most beautiful in Europe.

Every day is like Christmas on this street where the traditional Neapolitan nativity scene comes to life.

This triumphal 16th-century arched gateway leads to the oldest street in Palermo.

"Stairs of the Turks", a chalky white cliff eroded conveniently into stairs, allowing for easy pillaging.

Cretean quarry suggests real-life site for ancient Greek myth of the man-eating Minotaur in his labyrinth.

A small island with shimmering pink sands, home to loggerhead turtles and rare plants.

This famous archeological mystery may be an ancient example of movable type.

According to myth, Zeus himself was hidden in this cave to escape being eaten by his dad.

A minotaur, a labyrinth, and a dubious restoration pull in visitors from around the world.

Famously misunderstood wonder of the ancient world

Spanish architects used seized Muslim gravestones to rebuild parts of the fortress.

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

This home designed for chocolate magnate Antoni Amatller is an exquisite treasure-box of Catalan Modernism.

This sweet-toothed bear searching for snacks has been a symbol of Madrid for decades.

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.