Another solution: "Milyen kórházak azok"? or "Milyenek azok a kórházak"?
First refers to the type of the hospitals(ex: psychiatric etc.), second more likely to the condition of the hospital like: do they serve good food, how are the rooms etc.
Thank you very much! I was wondering if it could be either of those, so that confirms that. ^_^
There are exceptions to rules in most languages, and this is one of them. ^_^ The word ház and any word ending with it takes an -ak plural suffix, so they are házak, áruházak, kórházak, etc.