Shipwrecks, mussels and sponges: Chicago is a scuba diving destination

One of the world’s largest scuba organizations was founded in the Chicago suburbs by Portage Park pool swim instructor Ralph Erickson. Decades later and Chicago still has a small but mighty scuba diving scene, driven in part by Lake Michigan’s many well-preserved shipwrecks. So Curious City jumped into Lake Michigan and talked with people in the local diving community who are carrying on the area’s surprisingly-robust scuba legacy.