This war hero's old shop remembers the fine line between medicine and quackery during the Revolutionary War.

The semi-reclaimed ruins of this canal were once part of an ambitious plan to reroute the mighty potomac.

At 207 feet, one of the world's longest continuous escalators.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

This Virginia railway overpass is said to be haunted by a serial killer in a rabbit costume.

America's Most Wanted's set resides in this tribute to the history of crime and punishment.

The unique traffic pattern named for an influential urban planner is also known as the Pedestrian Scramble.

Home to items never before seen by the public.