AJ Mine Gastineau Mill Tour: Education on mining for gold - See 107 traveler reviews, 76 candid photos, and great deals for Juneau, AK, at Tripadvisor. ... Alaska (AK) Juneau ; Juneau - Things to Do ; AJ Mine Gastineau Mill Tour; ... A truly worthwhile and fascinating tour, of a gold mining operation once profitable (and may be …Web