Opened in 1956 — a second span was finished in 1969 — the causeway held the record for decades as the world's longest bridge over water until China's Jiaozhou Bay Bridge opened in June 2011. Causeway officials were quick to point out that bridge's length includes several ramps and other features that shouldn't count, and after petitioning the Guinness Book of World Records, a new category was added: “Longest Bridge Over Water (Continuous)." The Lake Pontchartrain Causeway holds that record, at 23.87 miles. It remains a popular draw for New Orleans tourists who want to drive across the world's longest bridge — even if that statement must now be qualified.

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