Argo Gold Mill and Tunnel (Idaho Springs) - All You Need to Know .Book your tickets online for Argo Gold Mill and Tunnel, Idaho Springs: See 352 reviews, articles, and 209 photos of Argo Gold Mill and Tunnel, ranked No.3 on TripAdvisor . 2350 Riverside Drive, Idaho Springs, CO 80452 . Come visit one of the regions most amazing historic mining heritage sites, the Mighty ARGO Mill.argo gold mill co,Argo Gold Mine And Mill | ColoradoArgo Gold Mine And Mill. Visit Website. 2350 Riverside Dr. Idaho Springs, CO 80452. Get Directions. City: Idaho Springs. Local: 303-567-2421 · Argo2350aol.