 Complete the following phrase:  The community of Casas Adobes is also on the Northwest Side, with the distinction of being Tucsons first suburb, established in the late 1940s. Casas Adobes is centered on the historic Casas Adobes Plaza built in 1948. Casas Adobes is also home to Tohono Chul Park, which is now within the town of Oro Valley, a nature preserve near the intersection of North Oracle Road and West Ina Road. The 