The Ytterby Mine is a historic quarry located in Ytterby, Sweden, known for its rich deposits of rare minerals. Discovered in the late 18th century, it has produced several important elements, including yttrium, ytterbium, terbium, and erbium, all named after the mine. This site played a significant role in the development of modern chemistry and materials science. The mine's unique mineralogy has attracted scientists and researchers, making it a key location for studying rare earth elements and their applications in technology and industry.