An American city stranded at the tip of a Canadian peninsula where strict adherence to the "49th parallel rule" became problematic.

America's silhouette includes 100 square miles of wilderness jutting into Canada thanks to an old mapmaking error.

Captured in 1968, the Cold War spy ship is the only U.S. Navy vessel being held by a foreign government.

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

You can walk through the first Boeing Air Force One, which famously carried JFK's casket from Dallas back to D.C.

One of the only Florida forts to remain in the hands of the Union all through the Civil War still stands as a historic stronghold.

A gem in the small Missouri town where Winston Churchill coined the term "Iron Curtain" and effectively began the Cold War.

Once America’s most beautiful army base, this abandoned military fort on the coast of Monterey Bay has been left to the elements.

An abandoned network of military bunkers and tunnels open for anyone willing to descend into the darkness.

Road signs in Namibia mark the location of one of the five major circles of latitude.

The world's most remote airport.

The Cold War-era "underground Pentagon" is a sprawling subterranean hideaway for the Defense Department.

The NASA scientists behind Apollo 11 started out developing Nazi weapons at this abandoned German rocket factory.

The former Naval shipyard is open for exploring - mostly.

This haunting ghost ship stands beached in the waters off the coast of the Falkland Islands.

This WWII aircraft museum presents its wrecks like taxidermy, complete with recreations of the crash sites.

Back in the tiny USSR.

The world's largest fully steerable radio telescope.

There was a top secret plan during World War II to seal a group of soldiers inside the rock.

Single runway interrupted by a busy road that cuts across its middle.

The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.

The crown jewel of the Queens Museum is a nearly 10,000-square-foot architectural model of the city originally built for the 1964 World's Fair.

A mysterious air force base built to resemble a Long Island fishing village.

It has an American Dream Car exhibit, Europe's largest Formula One collection, and many, many mannequins.