If you're ever in central Kansas, which I personally do not recommend, you can take a tour of a salt mine under Hutchinson, KS. https://underkansas.org/ https:

If you're ever in central Kansas, which I personally do not recommend, you can take a tour of a salt mine under Hutchinson, KS. https://underkansas.org/ https://underkansas.org/ It's worth your time and money, unless you have a particularly vivid imagination. You ride a skip 600 feet down.