The castle where Martin Luther secretly translated the New Testament from Greek to German while in hiding.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

The site of Austria's biggest concentration camp now honors its victims.

The national park was once a plantation estate.

One of its engravings is believed to be among the first representations of medical and surgical instruments.

Acres of salt crystal pyramids dry in the sun along Thailand's "salt road."

This spot in St. Louis, marked with a simple sign, has seen more pro baseball than just about anywhere else in the world.

Fragments of architectural wonders from around the globe are embedded in the newspaper building's walls.

The Pentagon sits on a former island that was in Virginia at low tide and D.C. at high tide.

This $3 million model train takes you through Chicago, Seattle, and the thousands of miles in between.

The unluckiest U-boat in the entire German fleet is now on display in a Chicago museum.

The 606 is a decade in the making.

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

Residents of Fremont in Seattle have considered it the center of the universe since the 1970s.

Washington's iconic carousel has a nice piece of Civil Rights history.

This rare triple-jurisdiction drawbridge passes through Virginia, Maryland, and Washington, D.C.

This magnificent museum claims to house the cranium of a disciple and the skull of a pope.

Among the ostentatious rococo ornamentation of this church, an image of death cuts the life-thread.

Soaring over 6,000 feet in the Bavarian Alps, this beer garden was once Hitler's 50th birthday present.

This splendid tomb may look fantastic, but there's nothing in it...

A Black Forest cuckoo clock theme park features one timepiece big enough to walk inside.

A copy of the Statue of Liberty greets visitors to the birthplace of Auguste Bartholdi.

A formerly glacier-tipped volcano that inspired none other than Jules Verne.

This black church sits alone among a field of lava rock.