Holiday in the Park Lights
Time Out says
As usual, Six Flags Great America is open for the holidays, though you won't be able to ride any of its biggest roller coasters during your visit. Instead, the amusement park strings up more than three million lights for visitors to enjoy as they walk along the midways, accompanired by seasonal entertainment, photo ops, carousel rides and s'mores roasting pits.
Prefer to stay warm inside your car? Six Flags will also host a drive-through light show on select dates from December 3 through January 9, which showcases the same lights and seasonal music as you'd see and hear during the walkable experience. Tickets are available per person (not per car) and start at $17.99 a head.