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Tour the Wieliczka Salt Mine
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The oldest mine in Poland and one of the oldest in the world.
Salt Mines of Garmsar, Iran. | Iran, Salt cave, Architecture
There's A Salt Mine In Poland With Underground Lakes, Chapels, And Chandeliers Made Of Salt And It Looks Unreal (30 Pics) | Bored Panda
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Underground Romania: Five salt mines to visit in the country | Romania Insider
Salt mining - Wikipedia
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The Realmonte Salt Mine in Sicily | Geology Page
