The fairy tale castle of the "fairy-tale king."

Each year melting snow turns these Austrian hiking trails into scuba zones.

This historic island prison holds one of the dungeons from the Count of Monte Cristo even though it is a work of fiction.

This medieval tower is all that remains of the castle where Joan of Arc was held before being burned at the stake.

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

The bears of Bern have been a city highlight for over 500 years.

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

A nearly 500-year-old sculpture depicts a man eating a sack of babies, and no one is sure why.

An exquisite Baroque church in Vienna's old town.

Baroque celebration of the end of the Great Plague of Vienna.

This medieval city gate is now a blend of the past and the modern world.

More than 450 years ago, an Italian nun became the first woman to paint the iconic subject.

Secret refuge and museum of the Duke of Florence.

An ancient Roman temple first dedicated to an emperor's wife is now a church.

This one-of-a-kind Roman arch is not actually dedicated to the god Janus.

The ruins of the largest gladiatorial school in Rome are largely hidden under modern streets.

The best preserved Paleochristian basilica in Rome hides a number of oddities and secrets.

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

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

The yawning maw of this pagan visage is said to bite off the hands of liars.

Over 12,000 hygiene oriented objects and exhibits.

Tourists often confuse this beautifully ornate former cigarette factory for a mosque.

The largest treasure hoard in Europe is contained in a castle that was bombed out during World War II.

This Dresden church was purposely rebuilt Protestant after being demolished in World War II.