This region is full of marshes and wetlands, especially the Big Bend spot during the panhandle, that's sparsely populated due to dense marshes and woodlands. Nationally, the Coastal Plains lengthen from the New Jersey coastline all the way right down to the Texas-Mexican border Coastline. This fact file seems at https://funbookmarking.com/story19933353/florida-things-to-know-before-you-buy