There are several places in Chicago that have large Christmas trees during the holiday season. One of the most popular places is Millennium Park, where a towering 50-foot tree is decorated with thousands of lights and ornaments. Other notable locations include the Chicago Christmas Market in Union Station, Navy Pier's Winter Wonderfest, and the Christkindlmarket in Daley Plaza. Each location offers its own unique festive atmosphere and decorations, making it a fun and festive place to visit during the holiday season.