The Okefenokee Swamp is a shallow, , peat-filled wetland straddling the Georgia–Florida border in the United States. A majority of the swamp is protected by the Okefenokee National Wildlife Refuge and the Okefenokee Wilderness. The Okefenokee Swamp is considered to be one of the Seven Natural Wonders of Georgia. The Okefenokee is the largest "blackwater" swamp in North America. Although folklore and many references state that the word, okefenokee, is a Native American word, meaning,"land of trembling earth," it is actually the anglicization of the Itsate Creek Indian words, oka fenoke, which mean "water- shaking." The swamp was designated a National Natural Landmark in 1974.