Amasing that nobody has thought of creating a thread about those facilities.
Here is a sanatorium called Polonia in Kudowa Zdrój spa town. It is one of the most known landmarks in the town - they put it on all postcards etc.
BTW, arranging a longer stay in a sanatorium for medical treatment isn`t a big problem in Poland. People, not only elderly, apply regularly and when they are granted a typical 21 day stay, they only have to cover the expenses of food and accommodation, while the treatment is free if you are insured.