the Mississippi River above the mouth of the Missouri River. Most of Alton is located on bluffs overlooking the river valley. The Meeting of the Great Rivers National Scenic Byway runs along the Alton riverfront. A monument and observatory tower, Confluence Tower, located next to the confluence of the Missouri and Mississippi Rivers in neighboring Hartford, IL, has been constructed to provide an overview of the Great Rivers area. This point also marks the beginning of the famous Lewis and Clark Expedition. Also on the river at Alton is Lock and Dam 26, the newest and busiest lock and dam complex on the main channel of the Mississippi River. Adjacent to it on the Illinois side is the , which features tours of the dam itself several times per day. On the Missouri side is the Audubon Center at Riverlands, which is one of the best places in the world to view birds, as it lies near where the Mississippi Flyway merges the flight paths of the Mississippi, Illinois and Missouri rivers. Also adjacent to the Audubon Center is the Jones-Confluence Point State Park, where one can stand at the confluence of the Missouri and Mississippi Rivers. According to the 2010 census, Alton has a total area of , of which (or 92.44%) is land and (or 7.56%) is water. The National Great Rivers Museum is located at the new Lock and Dam No. 26, or Melvin Price Locks and Dam. The lock and dam are open for tours. The lock is a favorite spot to watch bald eagles, which feed on fish coming up in waters below the dam. A large bird sanctuary is located in an area of floodplain and wetlands on the west side of the river. The River Road goes right next to the river north to Grafton. Above that, it is often routed inland of the floodplain. It provides views of the dramatic contrast between the high cliffs of the Illinois side to the broad, flat, green agricultural countryside of Portage des Sioux, Missouri. The Great River Road is a popular bicycle touring route. Hidden in a notch of the cliff is the tiny village of Elsah, once a down-and-dirty, liquor-soaked tugboaters' retreat, now with renovated properties and antique shops in historic houses. Climate Demographics As of the census of 2000, there were 30,496 people, 12,518 households, and 7,648 families residing in the city. The