Hoosier Slide stood directly across the harbor and rose over 200 feet high. For centuries it was a landmark for Indians traveling the lake and later for French explorers, and in modern times it became a major tourist attraction. After the discovery of natural gas in Central Indiana, a large glass manufacturing industry was established, and the sand of Hoosier Slide became a source of supply for it. Shipments averaged 30 rail cars a day, and in 30 years, by 1920, the Slide was gone. At lake level the sand was dark red and contained human bones.