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

Long-abandoned trolley tunnels just a mile away from the White House are turning into an art space.

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

An extensive, if one-sided, history of U.S. law enforcement's war on drugs.

Once the supplier for noteworthy projects like the National Cathedral, this old brickworks now lies abandoned.

You could be standing at the site of one of D.C.'s most fatal tragedies and not even know it.

A double agent hid information for the Soviet Union beneath this bridge for more than 20 years.

Politicians, bureaucrats, and military officers gathered in this field near the Capitol to settle their disputes with blood.

A historic ruin just 20 feet away from a busy highway onramp.

The North Carolina grounds are leased in perpetuity to the British Commonwealth for as long as the WWII sailors are buried there.

Remains of a historic fountain that was mysteriously lost in the demolition of a D.C. traffic circle.

A much-maligned monument to teetotalism.

An unassuming, powerful monument north of the U.S. Capitol bears witness to the resilience of Japanese Americans during a time of grave injustice.

The ruins of this long-abandoned unsuccessful gold mine can still be found.

A diminutive memorial marks the site of a successful assassination by a right-wing death squad in America's capital.

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