The link has a slide show of each of the 9 displays along with information on hours and cost. Some are totally free, others ask for a donation, and the rest have a fixed cost. The most expensive is at the Missouri Botanical Garden and the price goes even higher the closer to Christmas we get. But, I've heard this is amazing.
We love the lights at Our Lady of the Snows in Belleville and I chuckled a bit when I read that any donation over 12 dollars will get you a plush elephant. Why an elephant?