One of the most well-known city festivals in the world.

The first recognized Neanderthal remains were found in this now-lost cave in 1856.

Breathtaking and huge 430 year old maps of Italy.

A museum dedicated to the history of a terrifying secret police is now held in their former headquarters.

The "Greatest Sewer" of ancient Rome is one of the oldest sewer systems in the world, and is still in use.

The ancient latrines of the Greeks, in all their public glory.

A mysterious ancient cemetery with Roman sarcophagi and Lycian inscriptions.

This ancient subterranean megalopolis is known for the hot oil traps that were installed above each of its entrances.

No one is sure if the world's fourth-largest diamond had been found in a rubbish heap or was pawned by Napoleon's mom.

Carvings in Turkey's Marble Road may have directed ancient Romans to a hidden brothel.

Traversing steep Alpine slopes, this engineering marvel is one of the longest and highest funiculars in the world.

Climb inside an iron crystal magnified 165 billion times its normal size.

A Gothic cathedral created from volcanic rocks.

This ancient Roman bridge and aqueduct still stands as a wonder of classical construction.

This Corsican Neolithic site is full of pre-Roman megalithic structures that may or may not be penises.

A copy of the Statue of Liberty greets visitors to the birthplace of Auguste Bartholdi.

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

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

Nestled on the banks of a river in Nuremberg is a small museum that was once home of the city's official executioner.

The sweet story of how American cargo planes became known as "Candy Bombers" during the Berlin Blockade.

The walls of Germany's Parliament still show the scars of the Red Army takeover in World War II.

A beautiful collection of taxidermy birds and rare pomological wax models.

This old wooden funicular railway leads to a cemetery in the forest.

The Stonehenge of Wales is one of the grandest neolithic dolmens still in existence.