The diesel locomotive is an American Locomotive Company (ALCO) PA1. Also pictured is the monument to the Vista Dome established in 1950, in Glenwood Canyon. Follow the link and go down to the middle of the page and you will see where it is now. And as always, ENJOY!
The first successful dome cars were conceived by Cyrus Osborn of General Motors Electro-Motive Division (EMD). In 1944, while traveling in an EMD-built Rio Grande locomotive through Glenwood Canyon in Colorado, it was Mr. Osborn that recognized the wonderful views the passengers could enjoy from a panoramic dome. His idea was to provide a full 360-degree view from above the train in newly built "Vista-Dome" cars.
~~~ The back of the postcard reads: ~~~
GIANT SIZE Natural Color Postcard No. 371 -- COLORFUL COLORADO -- Glenwood Canyon: the Vista Dome Railroad car was born in Colorado's magnificent multi-colored Glenwood Canyon. The monument was erected by the Denver & Rio Grande Western Railroad and General Motors at a cost of $6,000.00. The car is almost nine feet long and is scaled 1.25 inches to the foot.
D. & R. G. W. R. R. Color Photo. Published by Cooper Postcards Co., Lakewood, Colorado. Produced by Hirco Color, The A.B. Hirschfeld Press, Denver, Colo -- Suitable For Framing.