A natural landmark is a prominent feature in the landscape that is formed by natural processes. These can include mountains, rivers, cliffs, and unique rock formations. Natural landmarks are often used for navigation and can serve as important symbols of a region's geography and culture. Many natural landmarks are protected as national parks or reserves to preserve their beauty and ecological significance. Examples include the Grand Canyon in the United States and Uluru in Australia. These sites attract tourists and researchers, highlighting the importance of conserving natural heritage for future generations.