An abandoned church gets a second life as a massive beer hall and event space.

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

Light bulbs, scrap wood, and tinfoil comprise this homemade throne of the gods.

A heroic pigeon that, through a barrage of gunfire, delivered a message that saved over 100 lives in World War I.

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

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

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

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

A cavernous three-story, 43,800-square-foot basement that was forgotten about for 60 years.

Home to items never before seen by the public.

Baltimore's classic clock tower was once topped by a rotating, 20-ton medicine bottle.

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

The design of this historic domed church was influenced by Thomas Jefferson and intended as a statement of religious freedom.

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

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

Once America's tallest structure, now a Baltimore landmark.

A hidden alley in urban Baltimore is a haven for graffiti artists.

A blank headstone topped with a pile of pennies marks the final resting place of the infamous assassin.

The man who first patented the Ouija board rests in peace beneath a headstone that playfully reflects that achievement.

This free, take-a-book shop seems like a trick but isn't.

A museum dedicated to exhibiting remarkable outsider art.

Crammed into a Baltimore row house is an oddities shop that sells everything from skulls to dead insects.

It's not hard to see why the historic Peabody Conservatory of Music's library has been described as a "cathedral of books."

The trials and tribulations of marking Poe's grave.