Cedar Bog is a nature preserve with several different wetlands and a mile-plus-long boardwalk that provides an easy, dry, handicapped-accessible pathway through them. A paradise for naturalists and photographers, it contains several rare orchids, carnivorous sundew plants, grass-of-Parnassus, fringed gentian, and other plants and animals. Despite its name, it is not a bog but a fen. Over the last 200 years, more than 90% of Ohio's wetlands have been drained, making places like Cedar Bog critical remnants. In 1941, Cedar Bog became the first land protected by the State of Ohio specifically as a nature preserve. It is one of only 25 National Natural Landmarks in Ohio, recognized by the United States Department of Interior for its national significance, and it is also a Dedicated State Nature Preserve recognized by the Ohio Department of Natural Resources. Formed by land changes during the Ice Age, it reflects what much of Ohio was like at the close of the Ice Age 14,000 years ago.