The runoff from Minerva Spring is colorful and heavily laden with minerals. Minerva was aptly named for a Roman goddess presiding over handicrafts, arts and science. In the 1880s and 1890s wooden racks were built along the face of this spring and the water was diverted over them. Objects were hung on the racks and became coated with the dull, white travertine. These “coated specimens” were sold as souvenirs. This practice was later prohibited.