Wieliczka Salt Mine: Part of the salt sculpture The Last Supper is pictured at The Saint Kinga's Chapel in the Wieliczka Salt Mine near Krakow, southern Poland, December 15, 2011. According to the Supervisory Board of the Wieliczka Salt Mine, the historic mine extends for a total of about 300 km (186 miles) and functioned continuously since the Middle Ages until 1996 when the salt bed ceased to be exploited completely. (Photo by Kacper Pempel/Reuters)
