A super-sized promotional trick that is now a D.C. landmark.

This rare triple-jurisdiction drawbridge passes through Virginia, Maryland, and Washington, D.C.

The only place for a truly presidential dram.

The graveyard holding the remains of George Washington's slaves was forgotten for nearly 200 years.

A former mental hospital founded in the 1930s by a eugenicist who advocated for the forced sterilization of patients.

Two thousand artifacts from around the world collected by one woman who loved to travel.

There's a piece of New York City transportation history hidden in plain sight at a Manhattan subway stop.

Long the exclusive domain of birds and vagabonds, this little-known Central Park peninsula is open to the public once more.

Once considered the height of medical modernity, this structure is now the oldest remaining component of Roosevelt Hospital.

Elevated freight railway turned wildly successful urban park.

Try not to get slimed in Tribeca.

New York's oldest magic store.

Manhattan’s Battery Park has a whimsical carousel full of spinning, glowing fish.

Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.

A crumbling hospital from the 1850s on Roosevelt Island.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

A wonderfully curated used bookstore in an airport.

More than 5,000 contemporary and "historic" mustards from around the world.

The concrete shell of an industry giant remains as a playground for graffiti artists, auto scrappers, and paintball warriors.

Where the Model T was made and the assembly line was invented.

The birthplace of the Ford Model T is now a museum full of antique cars.

The highest bridge in America was built for an almost unnervingly small amount of money.

Earth's tallest volcano is sacred to Native Hawaiians, and home to a dozen world-class observatories.

The "plyscraper" is the world's tallest building made predominantly out of wood.