The photo above is reproduced here from a Denver & Rio Grande Western Railroad post card. The caption reads:

“America’s Best-Loved Travel Wonder–the Royal Gorge–is the scenic highlight of one of Rio Grande’s two routes through the heart of the Rockies. All daytime passenger trains make a ten-minute stop at the narrowest point in the Gorge…”

Amtrak’s California Zephyr takes the Moffat Tunnel Route, the other breath-taking rail crossing “through the heart of the Rockies.”

The photo below, reproduced here from a Vanishing Vistas post card, is credited on the card to C.W. Bill Brown, D&RGW RR.