Descendants of this colonial Pennsylvania family still travel from far and wide to visit the 300-year-old home of their Quaker ancestors.

An unusual and eclectic collection of local historical memorabilia.

The highest point in Delaware is located under a trailer so this marker across the street will have to do.

This collection of odd proofs of concept is like taking a walk through the imagination of a Victorian engineer.

A blend of art, antiquities, and Americana fill this museum, surrounded by whimsical, enchanting gardens.

Enchanting gardens surround a derelict mansion, all hidden in plain sight behind a stone wall.

This local gem houses the largest collection of pre-Raphaelite paintings outside of the U.K.

This weeping, 10-foot-tall sculpture was a maquette for a 9/11 memorial.

A drab two-story office space in Delaware is a hidden tax haven for Hillary Clinton, Donald Trump, and over half the Fortune 500 companies.

One of the oldest surviving Swedish-American homes in the United States.

The tombstone of the founder of the lost town of Ogletown is now stuck inside a traffic median.

The well-preserved remnants of a bridge that once made up a WW1-era military railroad.

This grove was planted more than a century ago by the War Mothers of World War I.

Fiji mermaids, mummified remains, and recreated cryptids are among the morbid oddities at this Maryland museum.

America's first nuclear-powered merchant ship is now a time warp to the atomic age.

Ship skeletons haunt Baltimore's waterways.

An eerie, abandoned military base engulfed by nature and graffiti is now home to a local park.

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

The oldest military monument in the United States.

This 16-foot, intricately detailed model of the Gearing-class destroyer has been called the most detailed model ship ever built.

The ruins of a castle sat decaying in this park for years before a massive renovation restored this area to its past beauty.

The tunnel under the Capitol Building where Congress takes out its trash.

One of the last active volcanoes on the Eastern seaboard.

An enormous warehouse filled with parade floats collected from over 50 years of patriotic celebrations.