 | Oak Island is approximately 140 acres in size and located just off the southeast coast of Nova Scotia. It is one of many small islands in the area and is now linked to the mainland via a narrow causeway.
Oak Island is noted as the location of the so-called Money Pit and the site of over 200 years of treasure hunting. Repeated excavations have reported layers of apparently man-made artifacts as deep as 31 metres (102 ft), but ended in collapsed excavations and flooding.
Critics argue that there is no treasure and that the pit is a natural phenomenon, likely a sinkhole. |
 | In 1795 Daniel McGinnis and a friend noticed a circular depression as if a pit had been dug and then filled in again. Believing something of value may have been buried there they dug to a depth of 9.1 metres. Initially they discovered a layer of flagstones followed by traces of pickaxes on the rocks.
Some stories say they found platforms of logs approximately every 3 metres. They failed to find anything of value but the story spread and was quickly linked to the missing treasure of Captain Kidd and even the notorious Blackbeard - Edward Thatch (Teach).
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Over the following centuries the pit has been excavated many times and prospectors have even included an American president, Franklin D. Roosevelt.
 | In 1909, at the age of 27, Franklin Delano Roosevelt joined the ranks of the Old Gold Salvage and Wrecking Company.
According to written correspondence, Roosevelt nurtured an interest in the Oak Island mystery well into his presidency. In a letter to a friend, the president intimated his intentions to return to the island, but was prevented from doing so by the outbreak of war in Europe |  |
 | The pit is claimed to be 'booby trapped" and has regularly flooded. Oak Island had claimed a total of six people since the mystery began.
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| The deepest the excavations reached is 72 metres.
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Oak Island lies on a glacial tumulus system and is underlaid by a series of water-filled anhydrite cavities, which may be responsible for the repeated flooding of the pit. This type of limestone easily dissolves when exposed to water, forming caves and natural voids.
| Bedrock lies at a depth of 38–45 meters in the Money Pit area. Dye tests concluded that the flooding was caused by a natural interaction between the island's freshwater lens and tidal pressures in the underlying geology, refuting the idea of artificially constructed flood tunnels.
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