On Aspen’s western edge, this site preserves a rare surviving link between the town’s silver-mining boom and the ranching era that followed. It began in 1891 as E.R. Holden’s lixiviation plant, an ambitious silver-processing works that used the uncommon Russell Process and briefly stood among the most notable industrial operations in Colorado before the silver market collapsed after the Panic of 1893. Later absorbed into the Marolt family ranch, the property reflected Aspen’s shift from mining to agriculture during its quiet years. Restored and opened as a museum in 2003, it now interprets both the industrial and agricultural history of the upper Roaring Fork Valley.