Lake Pontchartrain Causeway

The Lake Pontchartrain Causeway, or the Causeway, consists of two parallel bridges crossing Lake Pontchartrain in southern Louisiana. The longer of the two bridges is either the longest or second-longest in the world depending on definitions, measuring at 23.87 miles (38.42 km) long. The Bang Na Expressway, a viaduct in Bangkok, is longer at 54 kilometres (33.55 mi), but is excluded from most lists of longest bridges because it crosses water for only a minimal portion of its length.