Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Madison/Wells was a station on the Chicago Transit Authority's Loop. The station was located at 1 N. Wells St. in downtown Chicago. Madison/Wells opened on October 3, 1897, and closed on January 30, 1994; it and neighboring Randolph/Wells were replaced by Washington/Wells. Chicago Transit Authority, also known as CTA, is the operator of mass transit within the City of Chicago, Illinois and some of its surrounding suburbs.