Burial site more than 300 years old.

The highest point in North Carolina and the United States east of the Mississippi River, Mount Mitchell is named after argumentative explorer Elisha Mitchell.

This bug-eyed water wheel uses the power of the Sun to clean up Baltimore Harbor.

A blank headstone topped with a pile of pennies marks the final resting place of the infamous assassin.

The man who first patented the Ouija board rests in peace beneath a headstone that playfully reflects that achievement.

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.