St Louis, MO
The Herbaria Soap facility in St. Louis shows how 100 % plant‑based soaps are made, focusing on natural oils and essential oils instead of synthetic fragrances. Visitors can watch the cold‑process method from mixing lye and oils to casting in wooden molds, and see how glycerin is retained while super‑fatting ingredients such as shea butter and avocado oil are added for extra moisturization. The tour also covers the company’s origins as a home experiment, its growth into commercial production, and its distribution to national park gift shops and other regional retailers.