An ancient and majestic fortress that played an integral role in Portugal's road to independence.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

The final resting place of the great navigator, or maybe his brother.

The world's largest wooden structure.

An eccentric collection of antique items shares space with a prop-quality witchcraft museum.

Three bridges and one giant canyon make up this fantastic Spanish settlement.

The skull of the patron saint of lovers lies in the Basilica di Santa Maria in Cosmedin—maybe.

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

Ever hear of the Milazzo Cage?

The Vatican's secret porn-festooned bathroom was painted in erotic murals by one of the greatest artists of the Renaissance.

Breathtaking and huge 430 year old maps of Italy.

This community on a small Venetian island has taken to painting their houses in bright neon hues.

Venice's island of the dead.

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

Five candy-colored villages on the Italian Riviera.

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

Fortified medieval tower house with lovely roof garden.

The naturally mummified body of a peasant girl saint.

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

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

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

Among the ostentatious rococo ornamentation of this church, an image of death cuts the life-thread.

The site of a concentration camp where inmates were made to take part in one of the largest counterfeiting operations in history is now hauntingly empty.

After a nearly successful attempt on Hitler's life, the conspirators met their fate in the courtyard of this Berlin building.