Italian cave with exceptional acoustics and an unsavory history.

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

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

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

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

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

Pilgrimage site for star-crossed lovers.

A complex, nine-layer maze on the grounds of a Venetian doge's playground.

This city square is home to Amsterdam's oldest church and a statue honoring Dutch sex workers.

Sweden's "good old days" painstakingly re-created in a model village.

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

An abandoned set from the 1980 film "Popeye," claimed and repurposed as a theme park by creative locals.

The mountaintop inspiration for Umberto Eco's "The Name of the Rose."

The Pope’s secret escape route.

The world's highest and most dangerous infinity pool lies at the precipice of Victoria Falls.

Commonly acknowledged as the only public monument to the Devil himself.

Metro station with a claim to rock n' roll fame.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

The most visited, and possibly most controversial, museum in Germany.

This zoological museum began as the first great curiosity cabinet.

An amazing collection of wax anatomical models and terratological models.

An extraordinary collection of 18th century anatomical waxworks.

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