Chain of Rocks

Chain of Rocks refers to a region of exposed bedrock in a riverbed. It may refer to multiple locations near the Illinois-Missouri border:
 * Chain of Rocks, Missouri, a small town northwest of St. Louis
 * The old Chain of Rocks Bridge, now restricted to pedestrian and bicycle traffic
 * The New Chain of Rocks Bridge, its vehicular replacement
 * The Chain of Rocks Lock, a river-navigational structure nearby
 * The former Chain of Rocks Amusement Park site nearby