Government testing at the asylum briefly explored using marijuana as a "truth serum" on Nazi prisoners of war.

This grand gothic brewery has been pumping out suds for over a hundred years.

The site of the climactic scene from the classic horror film is now a historic landmark.

Franciscan monks created a facsimile of the Holy Land for North Americans who couldn’t afford the trip overseas.

This former asylum for Black Americans is haunted by its history of violence and racism.

The last remains of one of the oldest and largest oak trees in the United States calls this state park home.

Surrounded by traditional homes, this Tolkien-esque dwelling stands out on a quiet street in suburban Maryland.

The antique hotel still has a jail in the basement, though the cockfighting ring is long gone.

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.

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

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

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

Bizarre Cavern.

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

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

World's first "penitentiary," meant to be humane, drove men insane.

World's largest collection of serial killer artwork and other macabre exhibits.

Built in 1815, the stabilized ruins of the grist mill and sawmill are now gated, but interpretive displays on the features and functions of the mill preserve its history.

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

A relic of FDR's brief foray into utopian urban planning.

This abandoned asylum was once a state of the art facility before devolving into one of the most deadly mental institutions in American history.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.