This WWII-era military installation once held an entire city within its walls - now, its walls are falling down.

A magnificent, glittering building tucked into a tiny Bulgarian mountain town.

Sofia's legislative center is continuously reinventing itself.

A striking symbol of the Bulgarian capital.

Soldiers were buried next to Lee's house in the center of Arlington Cemetery to dissuade the general from reclaiming his property after the war.

The house where John Wilkes Booth conspired with his co-conspirators.

Bizarre living fossil only grows in a small chunk of the Namib Desert.

The remains of diamond fever taken over by the desert.

A desert that rolls right up to the ocean, where it's so dry animals live off the fog.

Formerly known as the Malay Quarter, Bo Kaap is a colorfully-painted suburb located in the “Mother City” of South Africa.

The Bloemen Route, or “Flower Route”, stretches 25 miles through prime Dutch tulip country as a result of “tulip mania,” the world’s first economic bubble.

Caves that can't seem to quit producing the remains of prehistoric humans.

One of the tallest buildings in Africa provides a great view of Johannesburg's unique geography.

The legend associated with these ruins understates the splendor of the mansion that once stood here.

A daring D-Day assault by U.S. Army Rangers is commemorated atop the high cliffs of this strategic point.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

America's first federal monument.

This stately building in Alexandria, Virginia was built by Freemasons to honor one of their most famous members.

Elevated freight railway turned wildly successful urban park.

This lurid German fountain plots the sad course of marriage from dating to death.

The hide of Stonewall Jackson's equine sidekick is on display not far from where the ashes of his bones are buried.

The remains of Martha, the last known passenger pigeon, serve as a tool to educate about conservation.

Art deco landmark on the outskirts of Washington, D.C.

The interior of the Overlook Hotel in "The Shining" was based on this Yosemite original.