17th century streets hidden under Edinburgh were once a breeding ground for the black death.

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

The bright red cars take travelers through breathtaking Tuscan scenery.

This bustling Italian plaza is built on the ruins of an ancient Roman amphitheater.

This real life asylum of horrors is now an abandoned ruin that hides the unbreakable code to one patient's insanity.

Pilgrimage site for star-crossed lovers.

The lost Latin words were reconstructed using the holes from the nails that once pinned them in place.

Explore this medieval cathedral by trying to spot all the malevolent monsters hiding in its beautifully colored windows.

Visitors dating back to the 1600s carved their marks in the stones of the iconic tower.

This enormous "cloth of the conquest" depicts the Norman invasion of England in mind-blowing detail.

A daring D-Day assault by U.S. Army Rangers is commemorated atop the high cliffs of this strategic point.

Walk through living pictures and music in the Cathedral of Images.

A memorial to the nearly 10,000 American soldiers laid to rest on the beaches of Normandy during WWII.

This ancient theater was once the home of fierce gladiatorial battles.

One of the largest ochre quarries in the world, hidden in a limestone landscape.

A natural arch carved by a river gave its name to the so-called "Cave of Forgotten Dreams."

The mental institution where Van Gogh created some of his most famous work now allows guests to walk in the artist's footsteps.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

A monument to the three wars that led to German unification towers within a Berlin traffic circle.

A distinctive former power plant turned university lecture hall looks like it could make you breakfast.

Fantastic views and thousands of love locks.

The monumental home of Prussia’s eccentric "Cannon King."

A memorial for a young woman and her ghost, which are claimed to have caused countless deathly shipwrecks.

The small alleys in Lübeck's Old Town are a result of medieval urban sprawl.