Have you visited Mighty Argo in Idaho Springs? If not, add it to your list when you visit this Colorado mountain town! I had no idea that Idaho Springs was where the Colorado Gold Rush started and now know so much more about the history of Colorado. This mill made Colorado so much money that it helped to remain separate from the state of Kansas. Today it is an EPA superfund site to continue cleaning up toxic waste in the water. #idahosprings #idahospringscolorado #thingstodoincolorado #thingstodoinidahosprings #mightyargo