CHICAGO (WLS) -- Navy pier's centennial wheel has given more than a million visitors on a unique view of Chicago. Now, we're taking you on another kind of special tour: a behind-the-scenes look at ...

While Navy Pier will be marking its centennial, the history of the Ferris wheel in Chicago goes back even further. The first Ferris wheel was built in 1893 for the city's World's Columbian Exposition.