An extensive collection of reliquaries containing the bones of saints housed in the largest Catholic church in Venice.

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

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

As can be expected from a centuries old church built in a canal city, the undercroft of this house of worship is beautifully flooded.

2300-year-old Roman road connecting the empire.

A lover's walk between hilltop towns, decorated with graffiti love notes.

Five candy-colored villages on the Italian Riviera.

This cathedral hides a sculpted dog that determines your fate and an unexploded shell from World War II.

Museum celebrating the ocean, with the largest wunderkammer dedicated to sea exploration.

Historic medieval fortified city in southwest France.

Lady Liberty's original designer installed a little clone in this French fountain.

The world's largest reflecting pool is just two centimeters deep.

Ancient paintings known as the "Sistine Chapel of Cave Art."

Lyon's miniature version of the Eiffel Tower was built as a statement in support of French secularism.

Antique cinematography artifacts fill this museum dedicated to the inventors of the moving picture.

Lyon, France is home to two remarkably preserved Roman theaters, one dating back to 15 BCE.

For hundreds of years, automatons moving to metallic music have been marking the passage of time.

Hundreds of hidden passageways weave through the old quarters of Lyon.

This Torino museum honors a soldier who kept the city safe using barrels of exploding gunpowder, losing his life in the process.

A copy of the famous statue can be found in this Florence piazza, along with one of the most breathtaking views of the city below.

The mummified relic of St. Antoninus.

This private skyway is filled with art and was expanded explicitly so that Hitler could appreciate a river.

The famous sculptor left his mark on this Italian wall in an internationally protected example of street art.

The doodles of a genius line the walls of a secret room under the Medici Chapel, where they were hidden for nearly 500 years.