#6 of 20 The Pontchartrain Causeway
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The Pontchartrain Causeway located in Pontchartrain, Louisiana is the longest bridge to cross over water in the world, even if it only stands 16 feet high.
What makes this bridge so scary, however, is that it’s actually possible to lose sight of land somewhere along the way, which makes some people feel as though they are traveling across a never-ending bridge.