California Zephyr dome-observation “Silver Solarium” sits on Track 4 at Denver Union Station and will soon depart on the rear of Amtrak No. 5 on the morning of February 5, 2018. To the right on Track 1 is a RTD A-Line electric commuter train entrusted with the main duty of shuttling passengers to-and-from Denver International Airport. Viewed through the “hole” in the platform roof, an overhead crane erects another building in the ever-changing downtown Denver skyline
