A secret hatch containing two parchments was discovered in this statue over 40 years after its installation.

An ancient Roman temple first dedicated to an emperor's wife is now a church.

These hut foundations are believed to be the residence of Romulus, founder of Rome.

An enigmatic modern marker left next to a historic Roman site.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

An early 20th-century bullring converted into a modern shopping center.

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

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

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

This former Baroque palace on the historic Calle Montcada is a rare architectural gem and was once the meeting place of an aristocratic scholarly society.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

This whimsical winery by Antoni Gaudí looks ripped from the pages of a fairytale.

The yawning maw of this pagan visage is said to bite off the hands of liars.

This one-of-a-kind Roman arch is not actually dedicated to the god Janus.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

The spot where the fascist dictator made some of his most famous speeches including declaring war on Britain and France.

A statue representing a lost Roman profession that was vandalized for centuries.

This ancient market is often referred to as the oldest shopping mall in the world.

Rome's semi-secret peephole vista is also a former Crusader stronghold.

Renaissance hospital featuring a rotating door into which unwanted babies were dropped.

The oldest operating pharmacy in the world features 800-year-old recipes.

These medieval skyscrapers dominate the skyline of this small Tuscan town.

Medieval torture techniques with a modern conscience.

This bronze boar's snout has been rubbed to a golden sheen by visitors seeking good fortune.