A lover's walk between hilltop towns, decorated with graffiti love notes.

The bomb-ravaged remains of of a colossal Neptune.

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

A labyrinth of ancient tunnels hidden below the city holds the ruins of 2,500 years of history.

Five candy-colored villages on the Italian Riviera.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

Metro station with a claim to rock n' roll fame.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

A tour of underground Berlin takes you through WWII air raid shelters and tunnels used to smuggle people out of East Germany.

A church of bones, decorated with 40,000 human skeletons.

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

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

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

Macabre astrological automaton clock dating to the late 1400s.

Late at night, the bust of the "Dracula" actor was snuck onto the facade of this Budapest castle.

A museum dedicated to a secret military hospital hidden beneath a castle in Budapest.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.

The ship built to ferry passengers and goods to the doomed Titanic is now the last remaining White Star Line vessel.

A museum marks and documents the site of the Titanic's launch.

The comedy and tragedy of Oscar Wilde is preserved in a Dublin park, captured in a sculpture of colorful stone.

The somber sculptures commemorating Irish Famine on the river Liffey in Dublin.

A museum that cashes in on its infamous little people while teaching you a thing or two about the Irish fey.

An Irish church where an 800-year-old mummy is reaching out of his coffin as if to shake hands.