This colonial tavern played host to George Washington, Thomas Jefferson, and other famous early Americans.

This stately building in Alexandria, Virginia was built by Freemasons to honor one of their most famous members.

This grave marks the passing of a historic Jane Doe whose identity remains a mystery to this day.

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

One street divides a single town that stands in two U.S. states.

America's first public mental health facility.

The ruins of this Thomas-Jefferson-designed mansion have been left to crumble since the Christmas Day they burnt down.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

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

Remnants of a storybook amusement park hidden behind a strip mall.

A winding district gerrymandered into the shape of a mantis.

This rare triple-jurisdiction drawbridge passes through Virginia, Maryland, and Washington, D.C.

A suburban museum tells the story of a historic transportation network and even provides rides in antique trolley cars.

A relic of FDR's brief foray into utopian urban planning.

The rooster who crossed the road lives on forever in Takoma Park, Maryland.

The tallest The Church of Jesus Christ of Latter-day Saints temple in the world soars above the Beltway.

Baltimore's classic clock tower was once topped by a rotating, 20-ton medicine bottle.

Giant acorn-shaped 19th century gazebo from which suburban Washingtonians gazed upon the original "silver" spring.

Rediscovered after a century, the father of the American Navy was reinterred in something dredged up from Davy Jones’ locker.

The longest escalator in the Western Hemisphere takes over three minutes to ride down.

A priceless collection of the Nation's cryptologic history.

A local farm's collection of unusual structures from a now defunct storybook amusement park.

The most famous location in China was home to whole dynasties worth of imperial rulers.

Scholar, adventurer, saint, and instigator of the Goa Inquisition.