Wieliczka salt mine, Poland
In southern Poland, Lake Wessel lies inky and unmoving in the deep. Filling the bottom of an old salt mine, it’s just one component of the UNESCO World Heritage Site which has been a functioning mine since the 13th century. Featuring supreme carpentry, centuries-old brickwork and ornate salt-crystal chandeliers in cavernous dining rooms, this fantastical setting is a favorite for the Polish film industry. The mine’s attractions include dozens of statues and four chapels carved out of the rock salt by the miners. The older sculptures have been supplemented with new carvings made by contemporary artists. About 1.2 million people visit the Wieliczka Salt Mine annually.