At first glance it looks like a regular winter landscape, and the only thing unusual about it seems to be the fact that it’s an inside corridor. But when you know what you’re looking at, it becomes far more fascinating than that. It’s not snow, it’s salt. The walls are salt-covered, they might as well be made of salt (but they might not be, unlike many other walls in this amazing place – the Wieliczka mine in Poland). photofree exgif stockphoto