“Cheery” is a word I would use to describe a front-yard flower garden, not an abandoned building. But when it comes to the property at the corner of 10th and Dearborn, it’s hard to attach another description. The plywood boards—which stretch across some two dozen windows and doors—are slathered with sky-blue paint and a slew of airplanes. It’s certainly not something I’m used to; I’m usually tiptoeing up and down sidewalks, squinting up at uneven roofs and crooked front doors. This … this is different. This is art where you’d least expect it.