This statue honors the author's groundbreaking family story.

The oldest military monument in the United States.

The 72-foot giant escaped confinement in a large patch of mulch only to be reburied in the sandy shores of the Potomac River.

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

A lawn full of retired spacecraft on display at one of NASA's first research labs.

Once home to seven different roller coasters, Glen Echo has undergone many transformations since its founding in 1891.

The site of the climactic scene from the classic horror film is now a historic landmark.

The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.

A tiny piece of the Moon is embedded in this stained glass masterpiece.

Home to items never before seen by the public.

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

Largest Roman Catholic church in North America.

A haunting tribute to pioneering photographer Clover Adams.

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

A museum dedicated to exhibiting remarkable outsider art.

A priceless collection of the Nation's cryptologic history.