Yellowstone Park
This Bloom Brothers divided-back postcard was copyright by Asahel Curtis for the Northern Pacific Railway Co. The message on the reverse reads:
A point on Cody road grade where scant room makes this spiral or loop, a necessity. Very striking road engineering.
The spiral or "corkscrew" bridge near Sylvan Pass on Yellowstone's east entrance road was originally built of wood, and opened to travel in 1903. The more substantial corkscrew bridge shown in this postcard was built in 1919 at the dawn of the automobile era in Yellowstone. Now the road clings to the mountainside, rather than following the drainage of Middle Creek as it did at the time of the corkscrew bridge, and this structure is no longer in existence.