The Russell Cave National Monument is a U.S. National Monument in northeastern Alabama, United States, close to the town of Bridgeport. The Monument was established on May 11, 1961, when the National Geographic Society donated 310 acres of land to the American people. The National Park Service now maintains it. The National Monument was listed on the National Register of Historic Places on October 15, 1966. Photo by Carol Highsmith, 2010.