Illustration on postcard of men overlooking the reservoir site and automobiles including a Union Pacific truck on the road. "Overlooking Resevoir Site" is typed on the top left hand corner.
Illustration of Arrowhead Trail on a postcard with the caption, "Crossing the desert, Arrowhead Trail." A car is seen driving through a blooming desert.
Postcard with an illustration of the Valley of Fire. "The Valley of Fire, Southern Nevada" is typed on the bottom. Site Name: Valley of Fire State Park (state park)
Postcard with an illustration of Colorado River looking upstream between mountains. The typed caption reads: "Colorado River, looking upstream, Boulder Damsite in 1931."
Postcard with an illustration of men working by the entrance a diversion tunnel. The caption reads: "Entrance to of one of the four 56 foot diversion tunnels."
Illustration on a postcard of giant tunnels creating diversions for the Colorado River during the construction of Hoover Dam. The caption reads: "Diverting the Colorado River through giant tunnels."
Postcard with an illustration of the view of Clark County Court House from the lawn outside. "Clark County Court House, Las Vegas" is typed on the bottom of the postcard. Site Name: Clark County Court House, Las Vegas (Nev.)