The stadium can be visited according to the corresponding event or concert arrangement, see the official website: http://www.soldierfield.net/events. At the same time, the stadium also has a guided tour on non-race days (about 45 minutes - 60 minutes each), the schedule can be found in the official website: http://www.soldierfield.net/content/stadium-tour-information
Trooper Field is right now home to the Chicago Bears football team. The stadium was initially constructed in the 1920's as a remembrance to American soldiers who had passed on in war. Today, Soldier Field likewise has various occasions from shows to egg-strolls to soccer matches. In case you are in the territory, look at the 250-foot stone divider design to pay tribute to the people who served in the American military. The stadium conducts visits (reservations required) from 9 am-5 pm every day, where you can get a look at the field, the concourse, sky suites, the guests locker room.