Amtrak engine #194 (P42DC) backs the California Zephyr into Union Station in downtown Denver, Colorado. The myriad of catenaries support RTD's Commuter Rail trains that also use the station.
The iconic Union Station in downtown Denver, Colorado is home to the California Zephyr which visits twice a day (the westbound train 5 in the morning and the eastbound train 6 in the evening).