After a full day of exploring on the keys, I pitched a tent in Everglades National Park (Florida, USA). This is the sunset from my campsite. These sparse slash pines (Pinus elliottii) are typical of one of three common environments. The other two are sawgrass prairie, and the slightly higher tropical hardwood forest, which is referred to as a hammock. The prevalent environment in any given area, is determined by small differences (only a few inches) in elevation above sea level. There are also coastal mangrove and fresh water cypress swamps and marshes.