The following is the text from the National Park Service Website. (
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Over the years, Ozark springs have been used as campsites, power supplies for grist mills, tourist resorts and even hospitals.
Hospitals? Yes, hospitals. Back in 1913, an Illinois doctor named C.H. Diehl bought Welch Spring for eight hundred dollars. Dr Diehl believed that the spring water had healing properties and that cool, pollen free air coming from the adjacent cave would be beneficial for people with asthma, emphysema, and tuberculosis, which was called "consumption." To tap this clean air resource, Dr Diehl built a hospital over the mouth of the cave. Welch Spring, which flowed from the cave, was dammed up so that water would close off the entrance. This was to force more air out through the cave opening into the hospital.
Dr Diehl was not blind to the scenic values of the region either. He hoped to run a thriving campground resort to supplement his medical fees with tourist dollars. In time his healing resort expanded to a few small cabins, a campground, a show cave and even had an electric generator running off the spring.
Unfortunately, the hospital and resort were not a big success. Other doctors wouldn't endorse Dr Diehl's methods and he therefore had trouble attracting patients. Roads in the Ozarks were rough and unpaved making it difficult to get into the Current River Country. Few tourists were willing to make the trip. By the time the doctor died in 1945, the project was being referred to as "Diehl's Folly."
Was Dr Diehl a charlatan or just a man ahead of his time? In time, tourists did discover the Current River, over a million come to canoe, camp, hike and fish every year. As for his medical ideas, he wasn't out of step with his times. Many people believed in the healing qualities of cave air and spring water. Years earlier a tuberculosis sanitarium had been built in Mammoth Cave, some three hundred feet underground.
The hospital is a ruin today, but still stands next to the beautiful Welch Spring. It is located between Cedargrove and Akers on the Upper Current. It is best reached by canoe. You can drive to it also, go north from Akers on Route K. Turn left on the first gravel road past the Akers Group Camp. At the end of the road, park next to the river and walk a trail north along the river for about a half mile. At the end of the trail you will be able to see the hospital, although you will be across the spring from you.
Please do not wade in the spring, metal debris from the hospital period may injure you. Springs are also delicate biologically and wading and swimming can cause damage.