People who visited the caves a long time ago may remember that toward the end of the tour they were allowed to touch two small stalagmites known as the salt and pepper shakers. This is no longer allowed because the oils from people's fingers discolored and polished the stalagmites which in turn could have prevented calcite from being deposited. Part of the parks mission is to protect and share resources with the public. For this reason they have asked that people no longer touch the salt and pepper shakers so that no more damage will be done; and the caves will be preserved for future generations.