I think that the salt mine itself isn't that cheap to maintain.
Yeah but the salt mine is one of the most visited places in Poland.
it is not cheap and it is always full but the local council can't put the money to good use.
I have had the displeasure of going to the offices in Wieliczka, it was amazing, like a prison.
The people working there were unhappy/unhelpful but I am not surprised because of the conditions they are subjected to.
I have also gone to the local council in neighbouring Niepolomice, a completely different world, possibly the nicest town hall i have ever had the pleasure of going to in any country.
The people reflected this and are very helpful.
maybe the word 'secret' is the key and they put on the list only less known things
That makes a lot of sence.