The 30th anniversary of one of Cincinnati’s most ubiquitous holiday traditions is upon us; the zoo’s almost two million LED lights line a series of festive strolls through the themed areas of the zoo, including Fairyland and Candy Cane Forest. Also check out a brand new make-your-own s’mores station, a North Polar Express Train Ride and a lights show on Swan Lake. The zoo’s cold climate animals will be out to play, including lions, red pandas, Japanese macaques, sea lions, reindeers and, of course, polar bears. $10 children; $15 adults. Parking $8. 5-9 p.m. weekdays; 5-10 p.m. Friday-Saturday. Through Jan. 1. Cincinnati Zoo & Botanical Garden, 3400 Vine St., Avondale. cincinnatizoo.org.