Rickrayfilms created this beautiful aerial mini tour of the lower Mississippi River, generally considered the USA's greatest waterway. It rises in northern Minnesota and runs about 3.7k km (2.3k mi.) through the country's mid-section, discharging into the Gulf of Mexico at New Orleans. It's the USA's largest river by discharge. Length-wise, strictly speaking it's not as long as its Missouri River tributary, but using a convention of counting the Missouri it's the fourth longest in the world.