Book excerpt: 10 Great Walking Tours Through the Most Colorful Neighborhoods in Chicago Follow Frommer's for an up-close-and-personal look at Chicago. Discover the landmark architecture, ethnic neighborhoods, historic homes, and spectacular lakefront that make the Second City second to none. LET FROMMER'S TAKE YOU TO: * The Loop, an open-air showroom of architectural innovation and contemporary sculpture, from the Sears Tower to works by Picasso, Calder, and Miro * The Magnificent Mile, lined with sleek skyscrapers and elegant shopping centers * The glittering Gold Coast, a tree-shaded stretch of historic homes along Lake Michigan * Oak Park, home to Frank Lloyd Wright's early architectural achievements With easy-to-use directions and maps-and the best places to take a break along the way