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

The young Black revolutionary was killed before getting to see a non-segregated pool in his hometown.

The final resting place of one member of the Amistad slave revolt who never made it back home.

The only ancient owl carving found east of the Mississippi.

This maximum-security prison was abandoned to make way for a national park.

The national park was once a plantation estate.

The juke joint where legendary soul artists ate, drank, and made merry.

The only Native American museum along the Oregon Trail, run by the peoples who have lived on the land for generations.

The only working large-scale tea plantation in the United States.

A ghost town originally established and governed solely by Black Americans seeking a place of their own, free from discrimination.

Maine’s only official memorial to the Underground Railroad.

The simple gravesite of a Romany clan leader is dotted with offerings, including cans of her favorite drink, Crush orange soda.

This jail once controlled by the Japanese military now sits abandoned on a remote Pacific island.

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

This professional clown's home is an outsider art wonderland.

Nature and religion are reunited at this unconventional church in the forest.

A tribute to a 13-year-old boy who was kidnapped in 1793 and escaped over two years later.

This block in downtown Brooklyn was a hotbed of antislavery activism along the Underground Railroad.

An eight-sided home built during a brief octagon craze in the 1850s.

In this Parisian garden's grotesque former life as a zoo it fed exotic animals to the bourgeois and put humans on exhibit.

A model of a galactic embassy is hidden in plain sight along the highway, proposed by a UFO religion to find the aliens that created life on Earth.

The spot where the namesake of the Douglas fir met his mysterious end on a Hawaiian volcano.

Washington's iconic carousel has a nice piece of Civil Rights history.

The South African dialect's complex history is immortalized in stone, in one of the world's only monuments dedicated to a language.