A diminutive plaque recalls the treetop sniper who almost killed Abe Lincoln.

The shelves in the back of this thrift store are devoted to saving, not selling, retro tech.

The rooster who crossed the road lives on forever in Takoma Park, Maryland.

A benevolent, 16-foot-tall river dragon lives on a suburban lawn.

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

One of the largest collections of Catalan literature and cultural materials outside of Spain, created by a community of 1960s expats.

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

A swimming hole in the historic industrial quarry that supplied the marble for the Baltimore Washington Monument.

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

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

An intricately designed junk art house with four extravagant junk art cars hidden in the suburbs.

This 16-foot, intricately detailed model of the Gearing-class destroyer has been called the most detailed model ship ever built.

The development and impact of electronic media showcased in a picturesque farmhouse in Maryland.

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

Walk a trail through a historic Quaker town that outlawed slavery in 1777 and was a major waypoint on the Underground Railroad.

An FDR-era tuberculosis sanatorium has stood abandoned in the suburbs of the U.S. capital for over 30 years.

Two dozen pinball games hidden away inside a most unlikely location.

The Forest Service's surprisingly sophisticated collection of wildfire prevention art features America's most beloved bear.

A relic of FDR's brief foray into utopian urban planning.

A lawn full of retired spacecraft on display at one of NASA's first research labs.

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

This dig site outside D.C. is known for its exceptionally high density of baby dinosaur fossils and dinosaur eggs.

An eerie, decaying ghost town destined to fade into the forest.

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