Waconda Spring, or Great Spirit Spring, was a natural artesian spring located in Mitchell County, near the towns of Glen Elder and Cawker City in the U.S. state of Kansas. It was a sacred site for Native American tribes of the Great Plains and, for a time, became the site of a health spa for American settlers. With the completion of the Glen Elder Dam in 1968, the mineral spring was sealed then disappeared beneath the waters of Waconda Reservoir.