Presidio de San Saba
Lost TreasureTexas, United States
Treasure hunters have worked the country around this Spanish fort for two centuries looking for the Lost Bowie Mine. The reason they come is that sometime after 1895 a prankster carved the word "mine" into the gatepost, underneath Jim Bowie's name.
Toynbee Tiles
Roadside OddityPennsylvania, United States
Cryptic tiles reading 'TOYNBEE IDEA...RESURRECT DEAD ON PLANET JUPITER' have been embedded in city streets since the 1980s. Investigators believe they've identified the reclusive likely creator, but he's never confirmed it himself.
Laguna de Guatavita
Lost TreasureCundinamarca, Colombia
El Dorado was a man, not a city. The Muisca covered a new ruler in gold dust and floated him out onto this lake to throw offerings into it. In the 1580s, a merchant cut a notch into the crater rim to drain it, and the notch is still there.
Fort Knox
ConspiracyKentucky, United States
The United States Bullion Depository, completed in December 1936, has been opened to outside visitors only a handful of times, most notably for a 1974 congressional and press tour meant to quiet rumors that the gold was gone. It reports holding more than 147 million troy ounces.
CERN
ConspiracyGeneva, Switzerland
Europe's particle physics laboratory and home to the Large Hadron Collider. Thanks to a gifted statue of the Hindu god Shiva and the sheer scale of its underground tunnels, it's also the target of internet theories claiming it opens interdimensional portals and causes the "Mandela Effect."