Amtrak engine #10 (P42DC) leads the California Zephyr through the Rainbow Cut, a geological feature of multi-colored layers of earth through which the Moffat Tunnel Sub runs.
UP 5105 (SD70M) leads the Rocky Mountaineer passenger train through Rainbow Cut at Plainview, Colorado. The high end train runs between Denver, Colorado and Moab, Utah, offering spectacular views... (more)
After leaving Denver, which can be seen in the upper right corner, the California Zephyr runs through the S curves at Rainbow Cut in Plainview, Colorado.