The Chicago Botanic Garden will host "Trains, Tricks & Treats" from 10 a.m. to 5 p.m. Oct. 20-21 at 1000 Lake Cook Road, Glencoe. The Model Railroad Garden will be decorated with spider webs, spiders, ghosts, goblins and pumpkins, and visitors are encouraged to come in costume and collect treats.

$5 for adults; $3 for children ages 3-12; parking is $20 per car.

Oct. 26-28: HallowFest: A Garden of Good ... and Evil. Hours are 6-9 p.m. Friday and Saturday; 4-7 p.m. Sunday. Visitors decide if they want to take the "spooky" or "friendly" paths. $17 in advance; $20 at the door; parking is $20 per car. Call (847) 835-8215