It's an experience for sure. We toured near closing time and ended up on our own tour with one of their historians. She was able to answer a lot of our engineering questions about the mine and their approach to preservation. A fun fact is that since the mine is made of salt, the rooms and passages twist and deform under pressure and humidity. The tour for the masses is light and saltysweet, but if you have the chance to visit try calling in advance to see if you can get a guide who can delve more deeply.