BOSTON--(BUSINESS WIRE)--The Field Museum, John Hancock Observatory, the Museum of Science and Industry, Shedd Aquarium, SkyDeck Chicago, and 20 more of Chicago’s top tourist draws have all come together on a new, customizable common ticketing platform. The new system allows visitors to Chicago to build a custom ticket that covers as many of the 26 attractions as they wish to see, all for a discounted price compared to standard ticketing options.