A former major munitions plant that has been converted into a sprawling art space.

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

While most wind tunnels test scale models, the "Cave of Winds" was large enough for actual airplanes.

This stunning blue and gold room changed cities twice before becoming part of the Smithsonian.

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

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

Washington's iconic carousel has a nice piece of Civil Rights history.

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

The little-known, 300-year history of the area includes former lives as a bustling tobacco port, parking lot, and industrial dump.

A museum dedicated to exhibiting remarkable outsider art.

Largest Roman Catholic church in North America.

This beloved Baltimore spot features caged dolls, a giant Pez collection, and many, many mannequins.

The design of this historic domed church was influenced by Thomas Jefferson and intended as a statement of religious freedom.

A monumental statue of RCA's mascot now sits atop a historical society roof after a life of moving around.

A priceless collection of the Nation's cryptologic history.

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

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

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

This recreation of a 19th-century dime museum is full of oddities.

This 15-foot tall obelisk commemorating the Philadelphia-Baltimore railroad connection sat neglected for over a century.

A small granite block at this monument's base is the only part of Lincoln's Tomb outside of Illinois.

One Pittsburgh musician's decades-in-the-making memorabilia collection is on display at this rock-n-roll curio shop.

A diorama of the Civil War, fought by cats.

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.