The highest point in Maryland is only accessible by hiking through another state.

This claimant to the title of "smallest church in the 48 states" doubles as an equally tiny, quasi-post office.

Bizarre and inspired combination store selling only two items: tires and bibles.

Captain John Smith thought these cliffs were amazing in 1608 but sharks thought so 20 million years before him.

This scenic Maryland park was the site of one of the worst prison camps of the Civil War.

This historic lighthouse was well known for the large number of women who served as its keeper.

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

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

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

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

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

A gorgeous mural outside a beloved D.C. restaurant pays homage to famous Black Americans.

A historic estate packed with George Washington's heirlooms, and its own nuclear bunker.

World War II-era bunkers are hidden under the beaches of this picturesque park, which is still scattered with wartime watchtowers.

One of the dwarven trees dates back to 1625 and survived the Hiroshima bombing.

The controversial urban planner who designed Washington, D.C., was buried in Maryland, and can presently be found in Virginia.

The romance of early commercial flight still fills this Art Deco destination.

At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.

These unusual rooms on wheels are holdovers from the 1960s.

Volcanic stone sentinels stand watch at a Korean Bell Garden in Virginia.

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

An unusual ode to the late Irish playwright, complete with a squiggly bust and coffin-shaped bench.

A statue of the legendary Celtic warrior queen who fought the Roman invaders stands in one of the cities she once destroyed.

She stares out across six lanes of traffic, clutching a musket and infant with determination.