For centuries, this town's hot springs have been embraced by rich and poor—and even by Popes.

Largely overlooked, this little fountain on Museum Island is a whimsical tribute to a Prussian king nicknamed the “Fatty Flounder.”

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

One man's quest to fix his toilet unearthed over 5,000 artifacts spanning more than 2,000 years of history.

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

An homage to the man who built California's version of Venice.

Rainbow-hued local gem in Venice.

Rome's semi-secret peephole vista is also a former Crusader stronghold.

The block of aged dairy is probably still edible after 2,300 years in a peat bog.

The doodles of a genius line the walls of a secret room under the Medici Chapel, where they were hidden for nearly 500 years.

A sinister pyramid in the Frari contains the heart of the famous neoclassical sculptor.

This magical-looking island is notorious for the misfortunes suffered by its owners.

This basement museum explores the art and artistry of fascism.

Two churches shoot bottle rockets at each others' bell towers in an unusual Easter celebration.

A submerged archeological park still holds the wonders of a Roman Sodom.

Antique gaffe kept in the basement of a small Vermont natural history museum.

Tour the world's largest deep-hole dimension granite quarry, where you can view the plant where gravestones are made and roll a ball down the outdoor granite bowling alley.

Tucked away in the Tower of London is the weapon once used to execute high-profile prisoners.

The ritual has been performed uninterrupted for nearly 700 years.

Tokyo’s only Vaudeville-cuckoo clock–steampunk-Victorian curio cabinet time piece.

This 700-year-old street food market features baby octopus and soy donuts.