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

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

Macabre astrological automaton clock dating to the late 1400s.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

Walk through Czech history in Prague's largest graveyard.

Art historians have debated the identity of this medieval stone rider since the 19th century.

A tiny basalt mountain with an observation tower overlooking the beautiful Bavarian countryside.

Go inside to really appreciate this 500-year-old technological masterpiece.

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.

A small island less than half a mile from Venice is a forbidden island with a dark and twisted past.

This deconsecrated church has seen many uses, from a tobacco storehouse to a cinema.

In the past, Renaissance sex workers were encouraged to entice customers on this bridge.

According to tradition this is the oldest church in Venice, but its actual age is a mystery.

This palatial spiral staircase was so unusual the name "snail" was given to the noble family who built it.

Venice's island of the dead.

One of the tallest bell towers in Italy plays a particular melody at just two times each day.

A stunning hermit's shrine on a steep rocky spur in Northern Italy.

These delicate sand pyramids look like naturally occurring gothic spires.

A place to see how French aristocrats lived in the early 1900s.

The top of society once luxuriated in this world-class hotel, which continues to impress, even in ruin.

An ancient rogue artist community hidden next to one of the world's most glitzy and glamorous cities.

Claude Monet immortalized this medieval bridge in two of his paintings.

An abandoned village that resides along the mountains of the Aosta Valley.

A 12th-century Italian skirmish gets reenacted with 500,000 pounds of flying citrus.