At 135 years old and counting, this historic print shop is heaven for poster nerds and music buffs.

The first version of this stalwart construction appeared around 3,000 years ago.

A Stalinist prison camp for the wives and children of men accused of betraying the Soviet state is now a memorial museum.

This ruined relic of the medieval city of Jahanpanah is a quiet oasis in the middle of New Delhi.

An ancient iron pillar in Delhi that seems to be rustproof.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

Graffiti from the 16th and 17th centuries cover the walls of this part of the Tower of London.

Richard III supposedly disposed of his nephews' bodies here in an effort to seal his claim to the throne.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

A hidden gem on the lawn of the U.S. Capitol Building designed by landscape architect Frederick Law Olmsted.

Members of Congress have traveled between the buildings on Capitol Hill for a century hidden from tourists, press, and storm clouds.

The tomb was guarded by soldiers from both sides of the war, and some left their initials carved in the brick.

An eccentric dictator's take on a Turkmen version of Disneyland.

Giant busts of 42 U.S. presidents are sitting in a field in Virginia.

For nearly a year, General Ulysses S. Grant was based here during the American Civil War.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

The romance of early commercial flight still fills this Art Deco destination.

An extensive, if one-sided, history of U.S. law enforcement's war on drugs.

This lovely picnic spot featuring thunderous jet landings is an aircraft spotter’s dream.

Please don’t anchor your boat onto the Department of Defense’s underwater data cables.

Rumor has it the hot dog stand was targeted by two Russian nuclear missiles.

At 207 feet, one of the world's longest continuous escalators.

This unique historical monument features large concrete spheres designed to resemble fallen stars.

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