Palmisano (Henry) Park

This guide to Palmisano Park in Chicago traces one plot of land through wildly different lives: a limestone quarry blasted three hundred eighty feet into a four-hundred-million-year-old reef, its closure in nineteen seventy, and the decades that followed when the city didn't know what to do with the hole it left behind. You'll hear how trucks filled the pit with debris for thirty years before engineers decided to cap it and sculpt a hill on top instead. Look for the raw limestone wall still exposed near the park's edge as you listen.