Ever seen 2.5 million holiday lights in one fell swoop? No need to think too hard to envision all that glow, instead, wander the grounds of the iconic ZooLights presented by ComEd and Invesco QQQ. There's no doubt that this extravaganza of lights is one of Chicago's best things to do during the holiday season stretch. On the zoo grounds, a brand new set of luminous displays await this year, plus family-oriented activities including holiday crafts, music and a photo op with Santa. No zoo visit is complete without seeing some lions and bears, so round out your fun-filled outing at the animal exhibits (which will be staying open late).