Christina Rutz · CC BY 2.0 · Wikimedia Commons

Coral Castle

added29 August 20261951

A structure in Florida that the Latvian Edward Leedskalnin built alone over twenty-eight years from limestone blocks weighing up to thirty tons. He worked only at night and stopped if anyone approached. Asked how, he said he had worked out the secret of the pyramid builders. He died in 1951 leaving no drawings and no explanation; an engineering answer is likely and dull, and there is nobody left to test it on.

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25.50028, -80.44500

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The Bimini Road

In 1968 divers off North Bimini in the Bahamas found, at five metres, a half-kilometre line of rectangular limestone blocks laid out straight. Its coincidence with Edgar Cayce's prophecy that Atlantis would appear off Bimini in exactly 1968 made the find famous. The USGS geologist Eugene Shinn cored the blocks through: the internal bedding of adjacent stones continues from one to the next as in a single slab, and the radiocarbon dates increase steadily along the line. It is beachrock, cracked into rectangles as it dried, and it occurs on coastlines everywhere.

122 km away

Ghost sightingYellow

Robert the Doll

A cloth doll in a sailor suit standing behind glass at Fort East Martello in Key West. It was given to the painter Robert Eugene Otto in the early twentieth century, and by family account he talked to it and blamed it for things broken and overturned in the house. The museum now asks visitors to request the doll's permission before photographing it, and the walls around the case are covered with letters from people who did not ask and connect their subsequent misfortunes to that. The doll is real, the museum is real, and there is an admission charge.

169 km away

Ghost sightingYellow

The St. Augustine Lighthouse

A Florida lighthouse where, during construction in 1873, the contractor's two daughters and another girl were killed: the handcart they were riding on the rails to the water ran into the bay. Keepers and visitors have reported children's laughter in the tower and a girl in a blue dress ever since. The place is well enough known that television crews come regularly, and the lighthouse staff keep a log of incidents of their own.

495 km away

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Sedlec Ossuary

OtherOrange

Catacombs of Paris

The Paris Catacombs (Catacombes de Paris) comprise an expansive underground labyrinth of historic limestone quarries and ossuaries spanning roughly 20 meters beneath the central and southern districts of Paris. Extending across more than 280 to 300 kilometers of abandoned subterranean galleries, a fortified section houses the skeletal remains of over six million people, forming the largest collective necropolis in the world.

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Nazca Lines

Giant geoglyphs etched into the desert of southern Peru more than 1,500 years ago. The animal figures and geometric patterns are only fully legible from the air — their purpose is still unresolved.