Home to three historic ships from the age of Vikings.

The world's most charming instant portrait studio also happens to be its smallest.

This functioning parish church is also the site of many concert performances due to its wonderful acoustics.

The only ancient site that remains on the south bank of the sacred Ilissos river.

A crushed gate and giant bronze head serve as a reminder of Greece's fight for freedom.

A grotesque collection of wax limbs depicting the symptoms of venereal disease.

Where commuters walk through remnants of an ancient Greek necropolis.

The first museum in the world devoted to sexual gadgetry.

Walk through Czech history in Prague's largest graveyard.

The hidden lair of an alchemist rediscovered in a 2002 flood.

The last municipal pneumatic post system in the world was in operation for over 100 years, and may run again.

This artificial cave looks like something out of a fairytale.

The oldest garden in Prague, once part of an medieval orchard.

A giant interactive periodic table with real samples of the elements.

Straight out of a nightmare, barcode-faced babies climb up and down Prague's television tower.

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.

San Gennaro, the patron saint of Naples, greets pedestrians between these narrow city streets.

The Neapolitan Cult of the Dead still cares for the skulls at this mini-Fontanelle.

A popular legend claims that the famous pizza was invented at a restaurant in this alley.

A marvel of Byzantine engineering under the streets of Istanbul.

The mummified relic of St. Catherine sits forever on a golden throne.

The wreckage of a tragic plane crash is on display at this museum devoted to a famous Italian conspiracy.

Over 100 towers were built in Bologna during the Middle Ages, but only 22 survive.