Skulls and skeletons are omnipresent in this church dedicated to souls trapped in purgatory.

Erotic art covers the walls of the largest ancient pleasure palace.

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

Ancient snack bar of the Roman Empire re-opened.

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

This amazingly well-preserved villa just outside Pompeii boasts rare examples of ancient Roman paintings.

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

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

An alchemist's "magic door" stands in the middle of a Roman park.

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

This chimerical bridge/tunnel appears to dead end right into the sea.

An ultra-modern diversity park in Denmark has turned an entire city block electric pink.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

The design of this beautifully crafted building was inspired by Norwegian glaciers.

This giant boulder is pinched over a 1000-meter abyss by two mountains.

Walk 2,300 feet above the ground on the "Troll's Tongue."

Longest road tunnel in the world features an air treatment plant and the illusion of daylight.

A thin pane of glass keeps visitors from sliding off this futuristic skywalk.

The last living thing to come out of the rubble after 9/11 is now a symbol of hope and resilience.

The 28-foot granite map plots the locations of 40 theaters in New York City.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

Manhattan's lighthouse, erected at the insistence of the unsinkable Molly Brown.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

A popular European tradition makes its way to the states on one of America's most famous bridges.