You can visit the underground salt mine located about 30 minutes outside of Krakow
Located about an hour and 20 minutes outside of Krakow, if you are in Poland this is a must see. Be prepared for a very solemn day. You can purchase group tours and tickets through https://www.sunshinedirect.com/ , ask for Janet or Todd.
Be sure not to miss this treasure located in the main town sqaure of Krakow.
This is a beautiful way to spend a morning or afternoon in Krakow. Visit this castle that is over 1,000 years old that used to house the Polish monarchs.