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

Once part of a dam servicing an early 19th century grist mill, the tucked-way falls are a tricky-to-find urban oasis.

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

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

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

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

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

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

A priceless collection of the Nation's cryptologic history.

Bizarre Cavern.

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

Fiji mermaids, mummified remains, and recreated cryptids are among the morbid oddities at this Maryland museum.

The haunting "Hell House Altar" is one of the few remnants of an abandoned college that has been a magnet for local legends.

This free, take-a-book shop seems like a trick but isn't.

Crammed into a Baltimore row house is an oddities shop that sells everything from skulls to dead insects.

The trials and tribulations of marking Poe's grave.

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

The site where Poe "in great distress, and ... in need of immediate assistance" likely died.

The U.S. Fish Commission’s effort to mass produce carp.

An Industrial Revolution-era public work that purified water using nothing but sand.

A glimpse of the Pacific Northwest‘s indigenous culture in Washington, D.C.

The hippo that stands on this university campus was once a drunken flea market purchase.

Stone markers on the campus of Gallaudet University commemorate a peculiar school tradition.

The only Leonardo Da Vinci painting in the Western Hemisphere.