See Juniper Junction at The Morton Arboretum, which is a new, large-scale model train display in the Arboretum’s Firefly Pavilion. Event cost: Free w/museum admission Event time: 10 a.m.-4 p.m.

Lace up your sneakers and register for the Firefly Race Series, a 3K or 10K running event, and support Chicago’s Morton Arboretum with every step. By Wendy Altschuler , Contributor.