Over at The Atlantic's In Focus blog, Alan Taylor has pulled together a collection of stunning pictures of salt mines from around the world. As he writes:
The process of mining that salt can produce beautiful landscapes, including deep, stable caverns, multicolored pools of water, and geometric carvings. Some of these locations have even become tourist destinations, serving as concert halls, museums, and health spas touting the benefits of halotherapy.
As always, see a lush, full collection of pictures over at The Atlantic's In Focus blog.