A unique collection of Soviet military artifacts lies hidden away in a disused train, in the unrecognized Eastern European republic of Transnistria.

This abandoned Soviet circus is slowly being restored to its Communist-era glory.

This massive concrete sculpture is said to be the heaviest communist monument on Earth.

Check out engineering marvels of the past at this unintentionally retrofuturist museum.

This folk art wall claims to be the world's one and only memorial to the bygone age of hippies.

This historic lavatory leftover features two levels of defecation stations completely without context.

This whimsical winery by Antoni Gaudí looks ripped from the pages of a fairytale.

Friction between grains of sand cause a curious "singing" sound.

A cave dug by a man directed by ghosts to find pirate treasure.

"Try not to knock anything over!"

Memorial of the Salem witchcraft hysteria in the town of Danvers, where it all began.

Surrounded by lonely toys, this Massachusetts gravestone marks the final resting place of six children who were murdered by poverty.

The grave of Mary Nasson is shrouded by witchy legends.

This tall Massachusetts folly got its name thanks to all of the purple prose its vistas inspired.

The haunting history of a little girl lost.

This donated headstone marks the grave of a pair of elderly women who were mysteriously murdered.

Restaurant in a 1741 farmhouse that touts the story of its haunting on its menus.

A New Hampshire grave with a grudge.

Taxonomy experiment known for quirky collections.

Murder scene memorialized in perpetuity by grisly obelisk.

Carved, egg-shaped stone with no explanation.

The New England cabin where an infamous British occultist conducted experiments in "magick".

The Vermont grave of a 4,000-year-old mummy prince.

Secluded amid upstate New York’s Adirondack Mountains lies this subterranean emblem of a nation on the brink of nuclear war. And it's for sale.