The fourth-largest city in the state, Gary is also the largest U.S. city founded in the twentieth century. Once a leading steel producing center that was often called "Steel City," Gary's beautiful Lake Michigan beaches now host a growing tourist industry drawn to the new multi-million dollar redevelopment project featuring casino boats and marinas. Water and air pollution have been vastly improved in order to help implement this economic shift. The geographical placement of Gary in the Calumet region provides visitors with a huge variety of natural attractions, from the lakeshore to protected inland prairies, nature preserves, numerous parks, and rare wildlife. Gary exists as a port of entry with enough resources to guarantee energy for industrial expansion.