Louisiana's Lake Pontchartrain isn't actually a true "lake"; it's really a brackish section of Mississippi River estuary. It forms the northern boundary of the city of New Orleans. Lake Pontchartrain covers an enormous area of 1.6k square km (around 600 square mi.) but is quite shallow - its maximum depth is only 20 meters or 65 feet. In this drone video by Bumble Bee Productions, you'll get a bird's eye view of the great lake, which famously overflowed when Hurricane Katrina struck the city in 2005.