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1972 Poland Wieliczka salt mine postcard designed by K. Rogaczewska.
Poland’s Wieliczka Salt Mine, in the suburbs of Kraków, produced table salt continuously for over 700 years. Although operation ceased in 2007, visitors can still tour the mine, where they can see statues and artwork carved entirely out of salt (including a chapel, complete with salt chandeliers!). In 1972, K. Rogaczewska designed this postcard, which depicts the hillside town of Wieliczka and the salt crystals of its mine.
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Also worth checking: Modern Polish maps and sharp stinking teeth.
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