11Shanyna Isom
There is a woman named Shanyna Isom living with a 'mystery illness' which causes her to grow fingernails in place of hair.
12Stone spheres
Costa Rica has numerous ancient stone spheres that were created in the era of the Diquis indigenous culture that flourished from 700 AD to 1530 AD. The stones are distinctive for their perfection, their number, size and density, and their placement in their original locations. Their meaning, use and means of production largely remain a mystery.
13Oak Island Pit
The Oak Island Money Pit is a mysterious pit on an island in Nova Scotia. Many people think the pit holds buried treasure. The pit has been baffling treasure hunters for over 200 years. There are booby traps, secret tunnels and clues around the island. No one knows what it's hiding, who built it, or when. The excavation started in 1795 but to this day what is at the bottom of the hole remains a mystery.
14National Hotel disease
A mysterious sickness known as the "National Hotel disease" affected as many as 400 people and nearly three dozen died who stayed at the National Hotel in Washington D.C. in 1857.
15Cleveland duck mystery
There is an abandoned building in Cleveland (formerly a plumbing supply store) that is inexplicably home to dozens of rubber ducks. Their origin remains a mystery.
16Mysterious tiles
Tiles with the mysterious message “TOYNBEE IDEA IN KUbricK’s 2001 RESURRECT DEAD ON PLANET JUPiTER.” has been popping all over the US ever since the 80s, and no one really knows who did it.
17Almonds
Most wild almonds are really poisonous and “eating even a few dozens in one sitting can be fatal” and that how we bred safe ones remains a mystery.
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15 Most Controversial & Costly Blunders in History
18BSAA Avro Lancastrian Star Dust
In 1947, a British South American Airways flight was flying normally over the Andes Mountains, but 4 minutes from landing, it sent a morse code message 'STENDEC' three consecutive times. The plane then vanished and the wreckage was not found for over 50 years. To this day, what 'STENDEC' meant is a mystery.
19Death pose
It is a mystery why so many birds and dinosaur fossils exhibit a 'death pose' - the characteristic posture consisting of head thrown back, tail extended, and mouth wide open.
20Shell Grotto
The Shell Grotto is a mysterious underground chamber discovered in a back garden in the South East of England during the Victorian era. Buried a few feet underground, it was excavated and found to contain myriad religious symbols from around the world. Its origins remain a mystery.
