This hidden Art Nouveau courtyard is an opulent feast for the eyes.

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

This subterranean shrine beneath a bike rental store celebrates the iconic Italian scooter.

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

A massive marble foot is tucked away in a small alley near the Pantheon.

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

This is the oldest Roman-made bridge in the city still existing in its original state.

This curious, round temple is the oldest still-standing marble building in Rome.

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

This small, ancient Roman temple was once a church dedicated to the patron saint of penitents.

The entrance to this Frankfurt subway station looks like an old tram car crashed into the concrete sidewalk.

This village in the northeast of France is packed with book shops.

A neo-gothic statue modeled on German Emperor Kaiser Wilhelm II, which had its distinctive mustache shaved off by Nazis in World War II.

A neighborhood church's unusual abstract stained glass was the final project of avant-garde artist Jean Cocteau.

A towering sword embedded in the ground commemorates the legendary Slavic ruler.

A perfectly preserved hill village where the buildings are painted like white lace.

A relic of the Cold War tucked away in the forested hills above Bratislava.

Also known as the Blue Church, the building was consecrated to the daughter of Andrew II.

This Slovak bridge is known both for its connection to a national uprising and its UFO-shaped eatery.

A massive sculpture of an obscure Celtic coin that has become a symbol in Slovakia.

The inverted pyramid design of this station stands out amid Bratislava's urban landscape.

The site is dedicated to an investigative journalist whose murder triggered a political uproar that changed Slovakia forever.

Often mistaken as a medieval Gothic monument, this unique cornerstone only dates back to the 1980s.

No one knows the origin of this creepy little stone man with an oversized phallus.