This landmark 1900 building, a fine example of Chicago's Prairie School of architecture, is not technically open to the public, except for a cafe and ice-cream parlor on the ground floor. But the Great Hall on the second floor, flanked by two curving loggias, is one of the city's most popular wedding reception spots, so if you stop by on a weekend, chances are you can sneak a peek while the caterers are setting up. Even if you don't make it inside, Cafe Brauer makes a nice stopping-off point during a walk around the park. Sit and sip a coffee, or rent a paddleboat at the edge of the lovely South Pond ($10 per half-hr.). Best of all, though, is the picture-postcard view from the adjacent bridge spanning the pond of the John Hancock Center and neighboring skyscrapers beyond Lincoln Park's treetops. Allow a quarter-hour, longer for a paddleboat ride.