Abandoned ships along a deserted beach feel like the set of a post-apocalyptic thriller.

The FBI's urban training course may have the highest fake crime rate in the world.

The remnants of a wooden-hulled fleet built and abandoned in WWI, now home to a thriving ecosystem.

The tallest The Church of Jesus Christ of Latter-day Saints temple in the world soars above the Beltway.

The iconic D.C. restaurant where the Cuban Missile Crisis was negotiated, now a Walgreens.

It was once the base for a series of domestic terror attacks.

This apartment building designed by a notable Washington D.C. architect housed the Qing Dynasty's Legation.

On the Fourth of July this area will transform into a Pompeii-like storm of falling embers and ash.

Disks are rolled out onto the south lawn to absorb the impact of Marine One's wheels like giant coffee coasters.

A hidden passageway now marks the site of an assassination attempt on Ronald Reagan that some say broke a 140-year-old curse.

Amid the sprawling Defense Intelligence Agency Headquarters is one of Washington's least accessible museums.

They sort through millions of dollars worth of diplomatic gifts on behalf of the government.

Before founding the American Red Cross, Clara Barton had a tremendous humanitarian impact by locating thousands of missing soldiers.

There's an old indoor swimming pool hidden directly underneath the White House Press Briefing Room.

The "lovely red Vega" of the legendary record-settling pilot.

Cold War intelligence agents monitored communist embassies from an attic in a former pigeon coop.

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

An atomic bomb-proof strongbox protects the U.S. Constitution from terrorists and thieves.

Government testing at the asylum briefly explored using marijuana as a "truth serum" on Nazi prisoners of war.

When it opened during the final years of the embargo, all the drinks and cigars were free.

A nostalgic bibliographic gem.

A historic estate packed with George Washington's heirlooms, and its own nuclear bunker.

A painfully obvious spy house sits right across the street from the Russian Embassy.

A wondrous old library overlooking the nation's capital.