This millennium-old site reflects a time when sugar was a treasured commodity.

How did a lighthouse wind up in the middle of this landlocked German city?

The largest mosque in Germany.

Thousands of tourists and residents in Cologne affix "love padlocks" on the Hohenzollernbrücke Bridge to symbolize their affections.

A church filled with the bones of hundreds of virgins martyrs—or so they say.

This amazing medieval fortress stands atop a promontory along the famous Cinque Terre.

Five candy-colored villages on the Italian Riviera.

Inside the small garden of two mid-century apartment buildings stands a centuries-old bell tower, separated from its original church and hidden from view.

The oldest church in Mantua was buried for centuries under the facades of other structures.

A medieval tower with a suspended iron cage used as an open-air jail for criminals who were exposed as a warning.

The seat of the Mantua bishop holds many secrets within its walls.

A small villa said to have inspired the design of the court jester at the heart of Giuseppe Verdi's 1851 opera.

Not far from the more famous House of Juliet, visitors will find the supposed residence of her lover.

Pilgrimage site for star-crossed lovers.

This sculpture of a rhinoceros suspended above a city square is meant to evoke the weight of the human condition.

This deconsecrated church has seen many uses, from a tobacco storehouse to a cinema.

The city of Parma's cathedral is home to one of the greatest illusionistic frescoes of the Renaissance.

Legend has it this fountain built to symbolize the Pope’s power hides a strange secret concerning Neptune's manliness.

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.

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

Next to the Leaning Tower of Pisa is a cemetery home to ancient sarcophagi and disturbing murals.

Three underground crypts and a pointed arch under the bell tower make this cathedral unique among Romanesque churches.

Southern Italy's spinning top village.

The sunlight passing through the opening of this huge cave system creates a magical effect.