This is the Lake Pontchartrain Causeway in Louisiana. It’s the longest bridge in the United States, spanning 23.79 miles across Lake Pontchartrain.
It’s also the longest continuous bridge over water in the world. 
The bridge connects New Orleans with smaller communities on the north shore of the lake.
It’s made up of two parallel bridges supported by 9,500 concrete pilings.
And do NOT get on this road with a rickety car! Also, have enough gas to drive for at least another 45 minutes and a good spare tire before you DO..
Lake Pontchartrain Causeway Is The Longest Bridge Over Water
For starters, Lake Pontchartrain Causeway is 23.8 miles long. For perspective, that’s a distance that someone driving at 65 miles per hour will take 22 minutes to complete.
Someone walking at a moderate speed may set out at 8 in the morning—and reach the other side at 4:00 PM. No other bridge in the world comes close.
Length: 23.8 miles
Of course, one may mention the 102-mile-long Danyang–Kunshan Grand Bridge in China or other sea bridges in the world known for their remarkable length. However, with all of these other bridges, the specific portion that runs above water is what really counts.
The bridges may therefore be long, yet the above-water portion usually falls short of the 23.8 miles that Lake Pontchartrain Causeway has set.
Yet, known simply as The Causeway, Lake Pontchartrain Causeway is not one bridge but actually two parallel bridges that cross Lake Pontchartrain in the southeastern region of Louisiana—and that run parallel to each other.
But the length of the bridges is just about the same. Only a negligible 0.01 mile makes up the difference. And of course, a causeway and a bridge are technically different structures.
