Thermal baths under the Tatras
Hot outdoor pools with mountain views. The best end to a hiking day, especially in winter.
Families
Older than Wieliczka and much quieter, with an underground boat ride and a long wooden slide. Kids talk about it for weeks.
Bochnia is the oldest salt mine in Poland, worked since the Middle Ages. The visit is more of an adventure than a museum: a small train, a boat on an underground lake and a wooden slide used by miners.
You can even sleep underground in the mine’s chambers. For families it’s often a better choice than the busy classic.
Wieliczka for the grand chapels, Bochnia for adventure with kids and far fewer people. With enough time, I suggest one, not both.