Wielicza salt minesThe famous Wieliczka salt mine is listed as a UNESCO World Heritage Site for the beauty of its sculptures. © O.T. Pologne
Numerous Polish sites, either natural or man-made are worth a visit. The Wielicza salt mines, in particular, which have been exploited for the past 800 years, and the underground caves of which have been said to have curative virtues against some allergies.