The Lake Pontchartrain Causeway – Mega Structure.
The Lake Pontchartrain Causeway, sometimes only the Causeway, is a causeway composed of two parallel bridges crossing Lake Pontchartrain in southern Louisiana, United States. The longer of the two bridges is 23.83 miles (38.35 km) long. The southern terminus of the Causeway is in Metairie, Louisiana, a suburb of New Orleans. The northern terminus is at Mandeville, Louisiana.
Read More: https://en.wikipedia.org/wiki/Lake_Pontchartrain_Causeway