Online puzzle of Poland: Wieliczka salt mine

Under Wieliczka lies a layer of salt, almost 400 meters thick, measuring 10 kilometers by 500 to 1300 meters. 5500 years ago the first salt was extracted already. Until the middle ages by vaporisation of the salty water, later by mining the salt.
By default the number of puzzle pieces is 100, but you can change that easily by clicking on Change cut in the menu. Have fun.
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