Next to the Leaning Tower of Pisa is a cemetery home to ancient sarcophagi and disturbing murals.

These medieval skyscrapers dominate the skyline of this small Tuscan town.

First founded in 1472, this is the oldest bank in the world. Its history may explain why we call financial institutions "banks."

A dismembered holy head stares out from her beautiful reliquary at the St. Dominic Basilica.

This strange bovine gargoyle is said to have been put in as a passive aggressive form of revenge.

Renaissance hospital featuring a rotating door into which unwanted babies were dropped.

A plaque on the base of this statue holds a bewitching design.

After years of being casually peed on by humans, this tree is peeing back.

From Nazi chemicals to the CIA, this architectural marvel has played a fascinating role in German history.

The entrance to this Frankfurt subway station looks like an old tram car crashed into the concrete sidewalk.

Carved fountains poignantly placed in parks and in front of special monuments.

Somber memorial to the May 10, 1933, book-burning which took place on this spot.

Fantastic views and thousands of love locks.

A set of 27 bamboo tubes creates an eerie soundscape that changes with the wind.

A statue dedicated to the antihero of the Nibelung legend.

Albert Einstein's head sticks out of a snail shell stacked on a rocket in this truly bizarre monument to the scientist.

This one-time health resort was used by aristocrats around the world.

A neo-gothic statue modeled on German Emperor Kaiser Wilhelm II, which had its distinctive mustache shaved off by Nazis in World War II.

A neighborhood church's unusual abstract stained glass was the final project of avant-garde artist Jean Cocteau.

A former ironworks that was the first UNESCO industrial site.

This magenta statue commemorates the legendary marriage between a mermaid and the city's founder.

This small chapel built into rock is the oldest place of worship in Luxembourg.

A rare cold-water geyser that bubbles to life every half hour.

A display of torture devices used in the Spanish Inquisition and other scourges of medieval Europe.