Brass cobblestones mark the places where individual Holocaust victims were taken from their homes.

A collection of objects supposedly singed by the hands of souls in purgatory.

The engineering wonder and pleasure dome of a much-maligned emperor still holds undiscovered secrets.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

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

This dam is part of the nation’s largest public power producer and a historic steward of Hiwassee River.

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

This museum is rotten with a century of wax medical deformities.

An incredible menagerie of more than 3 million taxidermied animals at the oldest science museum in Europe.

A large grotto built in the 16th century amidst Florence's famous Boboli gardens.

The largest and most famous wax anatomical collection anywhere in the world.

Overshadowed by other, more famous Maltese catacombs, this ancient burial chamber has one of the best examples of a ritual agape table.

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

The mysterious “claw marks” said to be left by the Devil on Pisa’s famous cathedral.

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

Legend holds that this knife serves as a chilling reminder of the deadly rivalry between two local builder brothers.

The last king of Poland was interred in this church nearly 200 years after his death.

An artificial date palm stands as a memorial to Warsaw's Jewish community.

In the summer, the area around this sculpture transforms into a vibrant concert venue.

This enormous 32-foot painting depicts Poland's greatest medieval battle in glorious detail.

Legend says this is actually a heartbroken prince waiting for his true love's kiss.

The giant statue and its model solar system honor the native Pole who declared that the Earth revolves around the Sun.

Special benches that play Chopin's music are scattered throughout his native city.