Hans G. Schantz (@aetherczar)

TIL Poland’s Wieliczka Salt Mine operated for more than 700 years, reaches more than 1,000 feet underground and contains over 150 miles of tunnels. Miners carved incredible works of art from the salt, including chapels, statues and even a life-size relief of Leonardo da Vinci’s The Last Supper. https://ift.tt/qWQ4cYE