If you are interested in historic (still working) technology, visit the mill, the mechanical "energy transport" system, the connected natural brine pump and, finally, this installation, with aims at increasing the salt concentration and assists people becoming healthy / during a cure. By the way, nice view over the river Saale.

One of the most remarkable mechanical devices I have ever seen using a river to drive a screw to bring up salt water to drip through a structure of branches so that people can breathe salt-air in the middle of nowhere. I suspect a couple guys drinking too many beers on lonely nights after the wives threw them out and said they were Taugenichts. They should get a Nobel Prize (posthumously, of course). I think such places (and there are many in Germany) are worth a visit.