Two dozen pinball games hidden away inside a most unlikely location.

This dig site outside D.C. is known for its exceptionally high density of baby dinosaur fossils and dinosaur eggs.

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

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

Examine the impact of the horse on Great Plains culture through exhibits on ranching, rodeo, and the Native American way of life.

Once a sewer culvert, this road tunnel now offers cyclists and pedestrians a subterranean stroll under the C&O Canal.

A small triangle of DC grass is the final resting place of one of Sonny and Cher's songs.

This grand gothic brewery has been pumping out suds for over a hundred years.

People escaping slavery may have hidden inside a corpse vault.

This small hilltop church weaves the urban history of Washington, D.C. with the national history of the United States.

This fertility idol of questionable authenticity inspired an iconic Indiana Jones artifact.

The Byzantine, pre-Columbian, and medieval art at this stately mansion are some of the most under-appreciated collections in D.C.

A Spiritualist house of worship where believers communicate with the dead in the spirit world.

A historic estate packed with George Washington's heirlooms, and its own nuclear bunker.

This bridge over D.C.'s Rock Creek Park is sometimes called the "Buffalo Bridge" because of its four buffalo sculptures, which were cast from a single piece of bronze.

A brass and marble scale model of the solar system embedded in the concrete.

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

This lonely waterfront memorial to the men of the Titanic was erected by the "Women of America."

Hike the unusual hoodoos and rock formations that form this little-known natural wonder.

You might recognize this historic Oregon mansion from its appearance in 'The Goonies.'

At the western edge of Palm Springs, a rugged desert canyon trail leads to a waterfall at the base of the San Jacinto Mountains.

A retired firefighter created this contraption so he and his family wouldn't die if accidentally buried alive.

Its vintage camera collection gives a snapshot of the past as viewed through a photographic lens.

It holds a fabulously designed tribute to astronomer Edmond Halley.