This beloved Baltimore spot features caged dolls, a giant Pez collection, and many, many mannequins.

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

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

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

An almost life-sized elephant named Ms. Ellie greets visitors at this jumbo-themed museum.

Berkeley Hot Springs presents to you "the only outdoor monument to presidential bathing."

Giant acorn-shaped 19th century gazebo from which suburban Washingtonians gazed upon the original "silver" spring.

An obscure public service from the U.S. government that redeems burnt, moldy, and soiled old greenbacks.

A much-maligned monument to teetotalism.

The fountains of the U.S. Navy Memorial are annually salted with water from the Seven Seas as part of a nautical ritual.

Enormous piles of historically significant stones, dumped by Congress in a forest, and abandoned for 60 years.

At 207 feet, one of the world's longest continuous escalators.

This unique historical monument features large concrete spheres designed to resemble fallen stars.

The rogue roots are gradually consuming some of the historic marble grave markers.

The first purpose-built art gallery in the United States is once again open as a center of craft arts.

Parking garage where Bob Woodward met Watergate source "Deep Throat."

A local farm's collection of unusual structures from a now defunct storybook amusement park.

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

A rotating cast of guys and dolls in front of a Washington, D.C. building.

More than 500 unique and specially designed cases collected by D.C.'s "Harmonica Case Man."

Long-abandoned trolley tunnels just a mile away from the White House are turning into an art space.

Washington's iconic carousel has a nice piece of Civil Rights history.

The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.

The longest escalator in the Western Hemisphere takes over three minutes to ride down.