Silver Crater Mine
Canada
Silver Crater Mine, previously known as the Basin Deposit, is an abandoned mine in Cardiff, Ontario, Canada. It has produced some of the world's most notable betafite crystals. The mine has been worked since the late 19th-century, with industrial mining of mica starting in 1927. Uranium was sought in the 1950s and the mine has been abandoned since 1955.
Mine data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).