In a 32-mile loop beginning and ending at the University of Chicago, you'll be able to see everything from wetlands to historic cemeteries on THE GREAT CALUMET BIKE TOUR. The day includes a break for a homemade lunch. May 21, 2006 from 10:00 a.m. to 6:00 p.m. Cost is $10. 5706 S. University St., 773-991-0613 or 773-646-4773.