The Wieliczka and Bochnia Royal Salt Mines are not only remarkable for their longevity but also for the role they played in the technological evolution of mining. Operating continuously from the 13th century until the late 20th century, these mines are a testament to the historical development of mining techniques across Europe. They are intricately connected to the same geological rock salt deposit and have been recognized as a UNESCO World Heritage Site for their contribution to the industrial history and the preservation of their underground wonders, including vast galleries, chapels, and sculptures all carved from rock salt.