The Decoy Capital of the World.

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

This massive swimming pool is the high tech home to the human-powered submarine races.

The whole world in one water tank.

Fascinating museum dedicated to the under-appreciated medical history of urology features some wince-inducing devices.

Brain collection and database that narrows the gap between man and animal.

Dogs, cats, horses, monkeys, frogs, and fish are laid to rest at the second-oldest pet cemetery in the U.S.

Electronic inventions that resulted in products and systems we use every day are on display in this labor-of-love museum.

Two dozen pinball games hidden away inside a most unlikely location.

Live data is transmitted from the Atlantic coast to instantly recreate the ocean waves in this fountain at the NOAA headquarters.

The longest escalator in the Western Hemisphere takes over three minutes to ride down.

A cave on the Maryland border where civilians took refuge during the bloodiest battle of the Civil War.

This Maryland farm is known for its amazing corn mazes and its 30-foot junkbots.

A hidden alley in urban Baltimore is a haven for graffiti artists.

The land is home to swimming ponies and a legendary 18th-century treasure.

An eerie, decaying ghost town destined to fade into the forest.

An overgrown garden stands as a grim marker of an unrealized dream.

An out-of-place Air Force radar dome is all that denotes this park as a former missile launch site.

The largest cemetery for enslaved people in Loudoun County was almost lost to history, if not for the research of a minister.

The oldest arched-covered bridge in Virginia has truly withstood the test of time.

This historic, one-acre island is the only legal place to camp in the city of Richmond.

This sprawling museum holds one man's giant collection of real tanks.

An innovative attempt to break a siege in the American Civil War still scars the earth today.

Hop on the train and tour an elaborate miniature town made completely of junk (including the train).