Lace up your sneakers for a visit to a truly terrifying gymnasium—Grim-nasium! Starting Oct. 11, The Children’s Museum Guild’s 55th Annual Haunted House will give you a courtside seat to witness all the action in this monster-filled gym. Cheer on your favorite phantom, but keep your eyes open—scary surprises lurk in the bleachers!

The Haunted House offers IPL’s Lights-On Hours (for children who scare easily) and AAA’s Frightening Hours (with the lights off, for children who dare to be scared).

Organized by The Children’s Museum Guild, the 55th Annual Haunted House, Grim-nasium, is presented by Old National Bank.