FDR's Art Deco hospital tower was hopelessly inefficient.

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

The legacy of a wealthy executive and his wife, this little-known art museum features works by Picasso, Monet, Renoir, Cezanne, and more.

These abandoned waterworks are crumbling into the Potomac River.

Surrounded by traditional homes, this Tolkien-esque dwelling stands out on a quiet street in suburban Maryland.

Every drop of D.C. tap water flows through this old waterworks.

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

She stares out across six lanes of traffic, clutching a musket and infant with determination.

This propitious plastic porcine has been petitioning park visitors to pick up after themselves for more than 50 years.

Once home to seven different roller coasters, Glen Echo has undergone many transformations since its founding in 1891.

The bridge's highly-contested plaque (once again) honors Confederate President Jefferson Davis.

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

One of the oldest standing structures in Montgomery County, Maryland.

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