New Orleans, Louisiana is the principal city located near the mouth of the Mississippi River. Built on a natural crescent-shaped bend of the river—earning its nickname "The Crescent City"—it sits about 100 miles (160 km) upriver from the Gulf of Mexico.
The Mississippi River Delta fans out below New Orleans into a vast wetland complex. The city's location on relatively high ground (natural levees) made it a natural settlement point, though modern levees and floodwalls are now essential for protection.