The oldest building in the District of Columbia was preserved because of a mistaken connection to George Washington.

A burnt orange monolithic dome structure perched on a hillside near Interstate 280.

The controversial urban planner who designed Washington, D.C., was buried in Maryland, and can presently be found in Virginia.

A nondescript building that's been functioning as a speakeasy for nearly a century and a half.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

The eccentric mansion of one the most popular horror authors of modern times.

The whimsical construction on the roof has given rise to many a Montgomery myth about its contents.

A luxuriant botanical garden below sea level.

Go inside the house that inspired L. M. Montgomery to create one of literature's most beloved heroines.

A preserved factory in the "Home of the Carrousel" is now a museum dedicated to the classic wooden ride.

The former home of the hard partying literary power couple is now one of the only museums devoted to their story.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.