The Glades!

At 2,357 square miles, (1,508,537 acres), the Everglades represent the 10th largest National Park in the United States. On the map below, you can see a rough estimate of the perimeter of the park. Although most of the protected area is swampland, the boundary for the Everglades also encompasses a lot of the coastal seas, including coral reefs and mangrove biomes. Most of the Everglades is at or near sea level, with the highest natural point being about 8 feet above sea level. There is one area, a shell mound built by the Calusa Native Americans, that sits on the 20ft mark (pictured). You can see that the City of Miami to the East is a possible threat to the Everglades, because the close border to the National Park prevents expansion, and is a hot spot for human wildlife conflict.