At nearly 24 miles in length, the Lake Pontchartrain Causeway is the world's longest bridge across water — it was even recognized by the Guinness Book of World Records in 1969. You should avoid this bridge if you have any sort of fear of heights or water; once you get far enough onto it, there is a portion of the bridge where you completely lose sight of land in all directions. Drivers have been known to freeze up during this eight-mile stretch, suddenly feeling trapped and frightened. It is a common enough occurrence that local police know to simply escort these motorists back off the bridge.
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