Macabre astrological automaton clock dating to the late 1400s.

This Polish cave has housed a dragon, a brothel, and an enduring legend.

France's most famous cemetery, with some of its most curious tombs.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

Erotic art covers the walls of the largest ancient pleasure palace.

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

The glowing blue Nymphaeum of Emperor Tiberius.

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

Five candy-colored villages on the Italian Riviera.

This picturesque Umbrian city has a subterranean side that has long remained hidden.

Rome’s legendary peephole vista is also a former Crusader stronghold.

Museum dedicated to literary greats of the Romantic Period is also the home in which Keats met his untimely end.

Installed in an act of one-upsmanship, the annual sundial in this church is also a symbolic victory for the Gregorian calendar.

A little sculpture with a large wardrobe.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

The walls and ceiling of this Polish church are decorated with thousands of skulls, with another 21,000 skeletons just below.

An underground city of salt.

The former Nazi Germany concentration camp stands as a museum to remember this dark chapter in European history.

Poland's oldest surviving university building holds a wealth of historic science instruments including some used by Copernicus.

Iconic rock formations that allow for exploration during high or low tide.

Rusty red sands line the shores of this Canadian Province.

Go inside the house that inspired L. M. Montgomery to create one of literature's most beloved heroines.