On our last full day in Poland we went to Zakopane, Zakopane is a little mountain city that is 2 hours from Krakow by car. You can go there by bus or train as well but it may take longer.
Anyways it is totally worth it, if you are a lover of mountains and polish architekture. All buildings there have their own style, Zakopansky style.
Many houses are made of wood and the roofs have been set deep as winters can be really hard here.