In addition to the intrigue and romance of an old mining town turned almost ghost town, Bonanza lies near the center of an ancient caldera -a volcano which has collapsed after spewing its magma to the earth's surface, that is between 30 and 35 million years old and measure about 15 miles in diameter. Learn more and check out maps of the region documenting volcanic activity from Saguache County local Bill Hatcher: Riddles in the Rocks: The Bonanza Caldera
More historic mining sites in Saguache County:
FOURTH STREET, SAGUACHE, CO
Robertson's Flour Mill (Located off the beaten path, just southwest of the town)
*Photos, from top: Eagle Mine in Bonanza; Historic Bonanza; Dean Coombs leans against the Saguache Crescent linotype machine in Historic Downtown Saguache; a glimpse into the Ute Theatre; artwork in the Hauck Pedersen Gallery; D&RGW water tank in Sargents, CO.