This fort down the Potomac from Washington, D.C. was once the only defensive fort protecting the capital.

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

A haunting exhibit in a wildlife refuge center highlights threatened species and the conservation efforts needed to save them.

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

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

This simple convenience store sits on the location where the Ouija board was named—and has a plaque to prove it.

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

This abandoned sea fort has become an accidental bird sanctuary.

A model home in the Medical Examiner's Office in which grisly death scenes are staged to train forensic investigators.

After hundreds of years of settlement, this once-bustling fishing village sunk into the Chesapeake Bay.

Ship skeletons haunt Baltimore's waterways.

Once home to seven different roller coasters, Glen Echo has undergone many transformations since its founding in 1891.

This abandoned Victorian-style house was built in 1884.

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

A girls' boarding school inspired by the Chicago World's Fair, once abandoned, now restored to strange and scenic glory.

The ruins of this long-abandoned unsuccessful gold mine can still be found.

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

This English-inspired Maryland garden is home to acres of opulent plant life including bushes shaped into an entire fox hunt.

An intricately designed junk art house with four extravagant junk art cars hidden in the suburbs.

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.

Bizarre Cavern.

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

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