Once the largest trading firm of enslaved people in the U.S., this building is now a museum that preserves Alexandria's dark past.

The Pentagon sits on a former island that was in Virginia at low tide and D.C. at high tide.

One of the oldest train stations still standing in Virginia played a vital role during the Civil War.

This little brick tunnel built by Confederate forces was used to conduct surprise attacks on the railroad.

These figures float and flutter in this fountain crafted by famed Swedish sculptor Carl Milles.

Standing for over 200 years, the abandoned home of a Revolutionary War hero and later a succession of prison superintendents.

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

This unique historical monument features large concrete spheres designed to resemble fallen stars.