Alabama is the thirtieth-largest state in the United States with 52,419 square miles (135,760 km2) of total area: 3.2% of the area is water, making Alabama twenty-third in the amount of surface water, also giving it the second-largest inland waterway system in the United States. About three-fifths of the land area is a gentle plain with a general descent towards the Mississippi River and the Gulf of Mexico. The North Alabama region is mostly mountainous, with the Tennessee River cutting a large valley creating numerous creeks, streams, rivers, mountains, and lakes.
The states bordering Alabama are Tennessee to the north; Georgia to the east; Florida to the south; and Mississippi to the west. Alabama has coastline at the Gulf of Mexico, in the extreme southern edge of the state. Alabama ranges in elevation from sea level at Mobile Bay to over 1,800 feet (550 m) in the Appalachian Mountains in the northeast. The highest point is Mount Cheaha, at a height of 2,413 ft (735 m). Alabama's land consists of 22 million acres (89,000 km2) of forest or 67% of total land area.Suburban Baldwin County, along the Gulf Coast, is the largest county in the state in both land area and water area.
Areas in Alabama administered by the National Park Service include Horseshoe Bend National Military Park near Alexander City; Little River Canyon National Preserve near Fort Payne; Russell Cave National Monument in Bridgeport; Tuskegee Airmen National Historic Site in Tuskegee; and Tuskegee Institute National Historic Site near Tuskegee. Additionally, Alabama has four National Forests: Conecuh, Talladega, Tuskegee, and William B. Bankhead. Alabama also contains the Natchez Trace Parkway, the Selma To Montgomery National Historic Trail, and the Trail Of Tears National Historic Trail. A notable natural wonder in Alabama is "Natural Bridge" rock, the longest natural bridge east of the Rockies, located just south of Haleyville.
A 5-mile (8 km)-wide meteorite impact crater is located in Elmore County, just north of Montgomery. This is the Wetumpka crater, the site of "Alabama's greatest natural disaster." A 1,000-foot (300 m)-wide meteorite hit the area about 80 million years ago.The hills just east of downtown Wetumpka showcase the eroded remains of the impact crater that was blasted into the bedrock, with the area labeled the Wetumpka crater or astrobleme ("star-wound") because of the concentric rings of fractures and zones of shattered rock that can be found beneath the surface. In 2002, Christian Koeberl with the Institute of Geochemistry University of Vienna published evidence and established the site as 157th recognized impact crater on Earth.