This one-room cabin where the young colonel slept during the French and Indian War.

This beautiful stone arch bridge wasn't even expected to stand for one day, but people have been crossing it for centuries.

Built by the patriotic residents of Boonsboro in a single day.

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

A faded sign from the 1920s remembers Baltimore's resistance toward banning alcohol.

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

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

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

This abandoned sea fort has become an accidental bird sanctuary.

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.

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

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

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

Ship skeletons haunt Baltimore's waterways.

The shelves in the back of this thrift store are devoted to saving, not selling, retro tech.

This dig site outside D.C. is known for its exceptionally high density of baby dinosaur fossils and dinosaur eggs.

This abandoned Victorian-style house was built in 1884.

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.

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

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

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

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