875 N. Michigan Avenue. Architects were Skidmore, Owings & Merrill. Built in 1970, the Center is considered the best of Chicago's 1,000-foot-tall buildings. In addition to parking levels, the lower and concourse levels contain shops and other commercial enterprises. There are 29 stories of office space, 49 stories of apartments, radio and television facilities, and a two-story restaurant. View Chicago, Lake Michigan, and more at 1,000 feet above the Magnificent Mile from the observatory. Daily. 312-751-3681.