* The Everglades: This is the largest subtropical wilderness in the United States, covering over 1.5 million acres in southern Florida. It's a vast expanse of sawgrass prairies, cypress swamps, and mangrove forests, with a unique ecosystem that supports a diverse range of plant and animal life.

* The Florida Keys: While not technically a "marsh" in the traditional sense, the Florida Keys are a chain of islands with extensive mangrove forests and shallow-water habitats. These areas are often described as "marshlands" due to their wet and marshy nature.

It's important to note that the Florida Keys are a distinct ecosystem from the Everglades, although both are vitally important to the state's biodiversity and coastal protection.