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

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

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

An eccentric company offers eccentric millionaires the opportunity to have spaceflight-related experiences.

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

Proto-CIA agents trained with grenades in the sand traps and fired machine guns from the fairways.

This massive swimming pool is the high tech home to the human-powered submarine races.

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

A mammoth pair of Civil War artillery guns abandoned out in the forest.

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

The world's oldest continuously operating airport was founded by the Wright Brothers.

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

This suburban house is made of dirt, and almost sparked a revolution in home construction.

A girls' boarding school inspired by the Chicago World's Fair, once abandoned, now restored to strange and scenic glory.

FDR's Art Deco hospital tower was hopelessly inefficient.

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

Once forgotten and built over, this historic Black cemetery now houses a poignant memorial.

An original apothecary from 1792.

This stately building in Alexandria, Virginia was built by Freemasons to honor one of their most famous members.

This colonial tavern played host to George Washington, Thomas Jefferson, and other famous early Americans.

An 18-mile-long tunnel for sewage waste will soon wind within the bowels of Washington, D.C.

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

The narrowest house in America is seven feet of pure spite.

The wooded estate of the Forest Service employee responsible for D.C.’s cherry blossom trees.