the 1960s, Oak Park faced the issue of racial integration with effective programs to maintain the character and stability of the Village, while encouraging integration on racial basis. This included passage of The Open Housing Ordinance in 1968 which has helped maintain the ethnically diverse population seen in the village still today. Oak Park has a history of alcohol prohibition. When the village was incorporated, no alcohol was allowed to be sold within its village limits. This law was relaxed in 1973, when restaurants and hotels were allowed to serve alcohol with meals, and was further loosened in 2002, when select grocery stores received governmental permission to sell packaged liquor. Today, alcohol, such as beer and wine, is easily accessible with many bars and cocktail lounges around the village. In 1889, Frank Lloyd Wright and his wife settled in Oak Park. He built many homes and the Unity Temple, his own church, in the village, before he left in 1911 to settle in Wisconsin. Oak Park attracts architecture buffs and others to view the many Wright-designed homes found in the village, alongside homes reflecting other architectural styles. The largest collection of Wright-designed residential properties in the world is in Oak Park. A distinct focus on historic preservation of important architectural styles began in the 1970s and continues, with many buildings marked as historically significant, and so far, three historic districts defined. Other attractions include Ernest Hemingway's birthplace home and his boyhood home, the Ernest Hemingway Museum, the three Oak Park homes of writer and Tarzan creator Edgar Rice Burroughs, Wright's Unity Temple, Pleasant Home, and the Oak Park-River Forest Historical Society. Oak Park and River Forest High School is a comprehensive college preparatory school, with a long list of alumni who have made major or notable contributions to their fields of endeavor. Among these are Nobel Prize-winning author Ernest Hemingway, football Hall-of-Famer George Trafton, McDonald's founder Ray Kroc, city planner Walter Burley Griffin, comedian Kathy Griffin, basketball player Iman Shumpert, and the voice of cartoon character Homer Simpson, Dan Castellaneta. Geography Oak Park is located immediately west of the city of Chicago. The boundary between the two municipalities is Austin Boulevard on the east side of Oak Park and North Avenue/Illinois Route 64 on the village's north side. Oak Park borders Cicero along its southern border, Roosevelt Road/Illinois Route 38, from Austin to Lombard; and Berwyn from Lombard to Harlem