Drone captures ghostly abandoned 'Plague fort' near St Petersburg

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A drone filmed a naval fortress named after Russian Emperor Alexander I, also known as Plague Fort in the Gulf of Finland near st. Petersburg on Saturday. The fort was constructed for military purposes in the middle of the 19th century. It was used as a plague laboratory from 1897 to 1917, which is how it acquired its nickname - 'the Plague Fort.' It was abandoned in 1980s, but still attracts many tourists.