The largest free-standing aquarium in the world resides in a hotel lobby in Berlin.

A slice of central Asia in the middle of Berlin.

Started as a kitchen garden, now the second largest botanical garden in the world.

A tour of underground Berlin takes you through WWII air raid shelters and tunnels used to smuggle people out of East Germany.

An eerie, derelict amusement park in Berlin.

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

Museum on earth sciences featuring a recreation of a famous curiosity cabinet.

Amalfi's pre-industrial history is slowly being engulfed by the lush vegetation of the Ferriere Valley.

In the early 1900s, hundreds of Black Americans found opportunity in this now-abandoned rural community.

It may appear to be a fancy junk yard, but each item has a story to tell and a lesson to impart.

Believed to be the remains of the lost Temple of Minerva, this nymphaeum has been known by its misnomer to this day.

A massive marble foot is tucked away in a small alley near the Pantheon.

This quirky collection of furniture also happens to be a public art installation.

An intact, still operating pharmacy from the 18th-century filled with numerous artifacts and paintings.

This scenic fortress dates back at least 2,400 years to the time of Magna Graecia.

When occupying Nazi troops detonated a mine below, medieval frescoes were revealed in this small cliff-side hermitage.

This extremely naked God of Drunkards welcomes visitors to Kochi Station.

Remnants of an old bank adorn this station's brick wall.

Europe's simulation of the Martian surface uses soil from Mount Vesuvius.

A masterpiece of modern architecture that caused quite a stir in Paris, recreated in Bologna half a century later.

The ruins of this medieval castle overlook the lake of Piediluco in what was once a sacred forest.

A traveling Bronze Age sacrificial stone that was used to honor elves, fairies, and other woodland spirits.

Inside a state forest, the forgotten remains of a Cold War defensive installation.

A mountain cave is the site of archaeological findings and Paleolithic rock art.