This is the world’s longest bridge over water. Its 9,500 concrete pillars support 4 lanes of high-speed traffic along a mind-numbing 23.8 miles or 38.3km (91% of a marathon), all of this a mere 15 feet (4.5m) above a shallow estuary lake. The Lake Pontchartrain Causeway connects the 13,000 people of Mandeville, Louisiana to New… Read more