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

Part of a WWII submarine is lurking outside the Washington Navy Yard parking lot.

A three-story tower of books about Abraham Lincoln is one of the more unusual monuments to the president.

Historic Hull Street was actually the first street with a proper name in the Boston area.

The ceiling of this vintage movie palace is covered in fantastic Art Deco murals.

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

This stunning blue and gold room changed cities twice before becoming part of the Smithsonian.

Centuries-old hoofprints and wagon tracks reveal themselves after a good winter storm.

The ruins of this Thomas-Jefferson-designed mansion have been left to crumble since the Christmas Day they burnt down.

The U.S. Army's giant warehouse of war art includes Hitler’s watercolors and Norman Rockwell oil paintings.

Three abandoned missile silos are hiding in plain sight behind a suburban development in Maryland.

Dogs, cats, horses, monkeys, frogs, and fish are laid to rest at the second-oldest pet cemetery in the U.S.

An allegorical sculpture in Maryland wears the artist’s politics on its trunk.

The wooded estate of the Forest Service employee responsible for D.C.’s cherry blossom trees.

This suburban house is made of dirt, and almost sparked a revolution in home construction.

This colonial tavern played host to George Washington, Thomas Jefferson, and other famous early Americans.

A former Confederate hospital serves as a remembrance of wounded and dead soldiers.

The iconic statue was moved to a new spot overlooking the James river after several years as a mascot for the local baseball team.

This museum devoted to the gothic author holds such interesting ephemera as his socks and walking stick.

Under a playground is a little-known sealed train tunnel that likely contains the bodies of workers trapped by cave-ins.

Within this lovely Richmond cemetery lie the remains of famous Virginians and some of Edgar Allan Poe's most beloved family and friends.

A 200-year-old bar with a cheeky name claims to have served Edgar Allan Poe his final drink.

A faded sign from the 1920s remembers Baltimore's resistance toward banning alcohol.

This bug-eyed water wheel uses the power of the Sun to clean up Baltimore Harbor.