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

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

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

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

An abandoned church gets a second life as a massive beer hall and event space.

Ship skeletons haunt Baltimore's waterways.

An eerie, abandoned military base engulfed by nature and graffiti is now home to a local park.

Despite violent work crews and massive delays this abandoned canal tunnel was built to last into the modern day.

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

An FDR-era tuberculosis sanatorium has stood abandoned in the suburbs of the U.S. capital for over 30 years.

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.

The remnants of a wooden-hulled fleet built and abandoned in WWI, now home to a thriving ecosystem.

Walk a trail through a historic Quaker town that outlawed slavery in 1777 and was a major waypoint on the Underground Railroad.

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

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

A 200-year-old bar with a cheeky name claims to have served Edgar Allan Poe his final drink.

A priceless collection of the Nation's cryptologic history.

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

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

An astounding collection of medical specimens, including bits of President Lincoln.

Bizarre Cavern.

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

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