Apparently, New Orleans has 87 miles of canals that are visible and 85 miles underground. Some 25 - 30 feet wide. Canal Street, once the widest street in the world, was planned for a canal in the median, but never built. By contrast, Venice has 28 miles of canals.
Opportunity or dilemma? Dyke and pump and pour billions upon billions of US dollars until the next hurricane wipes Orleans off the map, or rebuild a City of Canals?