Blue Water Lake
Missouri · Up to 70.1 m
A flooded lead-and-zinc mine pit in Oronogo, Missouri, minutes from Joplin, that filled with water after mining ceased in the 1950s. As 'Bluewater Lake,' its 14 acres of clear water reached depths of 200-230 ft — among the deepest inland dives in the Midwest — with training platforms, sunken attractions, flooded mine roads, and caves, run for decades by Captain John's Sports & Scuba. The site closed to diving around 2012 during EPA Superfund remediation of the surrounding mining district, with the pit used to receive lead-contaminated waste.