The Wieliczka salt mine is one of the most amazing places you can think of, not only in Poland but in Europe. If you don’t get to see it in person, here’s a picture to show you some of it up close. The wall is entirely made of salt, which is still partially gray but it already sparkles with little crystals. This close-up photo shows you where the salt you eat originally comes from. photofree exgif stockphoto