Hidden beneath the famous St. Peter's Basilica is a veritable city of the dead that may hold the remains of St. Peter himself.

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

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

Single runway interrupted by a busy road that cuts across its middle.

Denmark's famous pseudo-hill.

Opulence and fantasy collide in this royal chair which is supposedly made with unicorn horns.

Ancient snack bar of the Roman Empire re-opened.

A Nesting Doll of Churches.

This former Roman Catholic Church still contains the embalmed hearts and organs of 22 popes.

The world's biggest floating museum in Gothenburg, Sweden.

The northernmost point in Denmark is a turbulent sandbar created by two clashing seas.

Tiring of digging out the door to this church for every service, it was eventually abandoned to the sands.

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

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

Cold war icon and onetime "hole" in the iron curtain.

Old Danish castle immortalized in Shakespeare's Hamlet.

The oldest amusement park in the world has been providing a nice spot to have some fun since the 1500s.

Danish observation tower designed to look like a giant beer bottle.

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

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

The old observatory in Copenhagen has a spiral corridor used as a racetrack.

Copenhagen's celebrated theme park and gardens.

This colorful artistic feature atop a Danish art gallery allows visitors to stroll through a rainbow.

This huge industrial sculpture looks like a UFO and a factory had a baby.