This vintage postcard features a striking interior view of Wyoming's longest tunnel, measuring 3,200 feet in length. The photograph captures the tunnel's earthy, rugged walls illuminated by a series of overhead lights, creating a dramatic perspective that draws the viewer's gaze along the road leading deeper into the tunnel. The reverse side provides informative details, noting the tunnel's location on U.S. Highways 14 and 20, which serve as the scenic route to Yellowstone National Park through the picturesque Wapiti Valley. Captured by photographer Art Dexter, this postcard offers a glimpse into both the engineering marvel and the natural beauty that Wyoming has to offer.