The longest bridge in the world, The Lake Pontchartrain Causeway, is a causeway composed of two parallel bridges crossing Lake Pontchartrain in southern Louisiana, United States. The longer of the two bridges is miles long. Going here during the summer!
Lake Pontchartrain is the largest lake in Louisiana and the second largest saltwater lake in the U. It is actually an estuary, a partially enclosed coastal body of water with at least one river spilling into it and open access to the ocean.
The Lake Pontchartrain Causeway, or the Causeway, consists of two parallel bridges that are one of the longest bridges in the world by total length. These parallel bridges cross Lake Pontchartrain in southern Louisiana. (I think it is 9 miles long)