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

An alternate history park where the Union Army loses the war... to dinosaurs.

A pre-Industrial Age iron furnace and the site of a nearly-forgotten piece of Black history.

The rusting remains are visible sticking out of the waters of the Delaware Bay.

World War II bunker still standing on the New Jersey beach.

Look closely and you’ll notice that the color changes a third of the way up the tower.

A layered tribute to the work of mosaicist Isaiah Zagar.

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

A celebrity from the late Cretaceous period.

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

Two innocuous monuments found in separate locations attempt to unite a city.

Less a museum than a bizarre fantasy world created by artists and engineers.

This titanic oil company sign is a reminder of the Americana boom of the 1970s and also its commoditization.

Frank Lloyd Wright built this suburban synagogue late in life, but it stands among his most iconic masterpieces.

Built by the patriotic residents of Boonsboro in a single day.

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

An allegorical sculpture in Maryland wears the artist’s politics on its trunk.

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

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

Outsider art meets paleontology at this roadside reptile repository.

A daily replay of the experiment that proved the rotation of the Earth.

The sounds of the world's largest fully functioning pipe organ dazzle shoppers at a Philadelphia Macy's.

The only quarter of the Old City not dedicated to a major world religion.

A sprawling ancient Jewish cemetery with over 30 rock-hewn burial caves.