In Albuquerque, New Mexico, on the Rio Grande River, Michael discovers the headquarters of the Acheson, Topeka and Santa Fe Railroad and lends a hand with the restoration of an enormous locomotive. He feels the heat of New Mexico's most famous produce, the chilli pepper, and learns how to make enchiladas. In Williams, Arizona, Michael picks up the Grand Canyon Railway to his journey's end, one of the greatest sights on earth, and learns how the spectacular seven-million-year-old gorge of the Colorado River was preserved for the nation.