There must be a pun in this haystack somewhere...

A bit of retro transportation flair preserved in the world's largest department store.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

Rumor has it the hot dog stand was targeted by two Russian nuclear missiles.

FDR's Art Deco hospital tower was hopelessly inefficient.

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

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

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

The whole world in one water tank.

George Washington's dentures and Queen Victoria's dental instruments are in the nation’s official museum of the dental profession.

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

Through the decades, Black music stars have performed at this historic hub for music and the arts.

A gorgeous mural outside a beloved D.C. restaurant pays homage to famous Black Americans.

The first memorial dedicated solely to the Black troops who fought for the Union.

A derelict bit of infrastructure from the canal that once ran through D.C. is landlocked in the heart of the city.

A muscular Art Deco monument represents the struggle between regulators and unbridled markets.

The little-known, 300-year history of the area includes former lives as a bustling tobacco port, parking lot, and industrial dump.

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

The most accurate timepiece in the world.

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.

There’s a hidden military meme engraved on the World War II Memorial.

A nostalgic bibliographic gem.