First museum dedicated to the research and history of Epilepsy.

A man-made slag heap that you can "ski" down, and is home to the world sandboarding championships.

The oldest trees in Northern Germany.

Behold, a collection dedicated to Germany's favorite vegetable.

The housing complex served as an anti-fascist fortress during the Austrian Civil War.

Physicist’s epitaph provides final confirmation to a career of turmoil.

Apartment complexes built into huge repurposed natural gas tanks.

Beautiful Austrian natural history museum with carved ceilings and row after row of ancient taxidermy.

A flooded Mexican cave that hides a river beneath the water.

A magical sinkhole on the Yucatán Peninsula is adorned with mini waterfalls and hanging vines.

A plaque honoring a Hungarian hero of Italy is hidden in plain sight in Palermo.

This Neapolitan exhibition hall grants weird and wonderful insight into the intricacies of human biology.

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

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

This candy-striped tower is the farthest east you can go in the United States.

An ode to one of the first concerts broadcast via satellite.

A unique set of caves that spits waves back out into the ocean.

The air force base preserves its scars from the Japanese attack on Pearl Harbor.

The only royal palace on U.S. soil has been a territorial capitol, a military headquarters, and a prison for a queen.

The tragic reality of a town riddled with rumors of haunts, chemical spills, and serial killers.

For decades, this waterfall remained hidden because of an artificial dam.

A throwback train ride transports passengers through one of the lesser-known national parks in the country.

An elegant sandstone stairway built by the WPA still connects two neighborhoods in Akron.

The only presidential monument to display a late POTUS's actual casket.