One of the U.S. Forest Service's only mansions is outfitted with a dinner table for floating food.

Oldest existing wire suspension bridge in the United States.

A field of nothing but boulders which resembles a giant's gravel driveway.

This demolished goliath of American industry once loomed over the depressed town it once made thrive.

Board a mine car and descend the #190 slope 300 feet underground into the Clark Vein of coal.

On the Fourth of July this area will transform into a Pompeii-like storm of falling embers and ash.

Look closely and you’ll notice that the color changes a third of the way up the tower.

The "lovely red Vega" of the legendary record-settling pilot.

The actual model from the original "Star Trek" series is now on display at the National Air and Space Museum.

The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

One critic described it as "middle Mussolini, early Ramses, and late Neiman-Marcus." Another called it an architectural "natural disaster."

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

Legend has it that this bronze orb, which sat atop an ancient Egyptian obelisk, once held the ashes of Julius Caesar.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

The ruins of a town wiped out by the second-largest earthquake in recorded history.

A secret greenspace hides atop a Capitol parking garage.

The oldest continuously operating fish market in the United States.

Outside the Department of Transportation, a collection of artifacts honors the history of how we get around.

This lovely pocket park is one of the most under appreciated in D.C.

This lonely waterfront memorial to the men of the Titanic was erected by the "Women of America."