The "lovely red Vega" of the legendary record-settling pilot.

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

An overlooked oasis of quiet on the grounds of Washington's monumental basilica.

Perhaps the most scandalous statue of America's first president.

Largest Roman Catholic church in North America.

The actual model from the original "Star Trek" series is now on display at the National Air and Space Museum.

The walls of the iconic dome are hollow and have a secret stairway.

There’s a hidden military meme engraved on the World War II Memorial.

A museum cafe showcases Native American dishes and indigenous ingredients from across the Western Hemisphere.

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.

Fittingly, America's museum of architecture is itself a magnificently designed old building.

A cavernous three-story, 43,800-square-foot basement that was forgotten about for 60 years.

Home to items never before seen by the public.

Franciscan monks created a facsimile of the Holy Land for North Americans who couldn’t afford the trip overseas.

A larger than life statue of a steelworker keeps watch over a closed steel mill.

A collection of artifacts from Maryland's maritime past.

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

A winding district gerrymandered into the shape of a mantis.

This statue honors the author's groundbreaking family story.

Although built to generate electricity for Marylanders, this dam has become an all-you-can-eat buffet for American bald eagles.

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

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

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

A star fort along the C&O Canal in western Maryland that protected America in three wars.