This is the Florida Everglades, the widest, slowest river in the world. Anything that grows in South Florida does so because of fresh water from here – from cypress trees to sod farms to subdivisions. It’s the only place in the world where alligators and crocodiles both live (crocodiles are the ones with pointy noses and teeth visible outside their mouths).
Image from the USGS “Earth As Art” gallery.