Hoover Dam (Wikipedia - Hoover Dam.) spillway tunnel.
Abstract shapes in Hoover Dam.
The cold water from a creek flowing into the Colorado River was pure joy and relief. In mid-afternoon, the thermometer in the Bright Angel campground showed 38 degrees Centigrade in the shade, which meant mid-to-high 40s in the sun.
The ranger there recommended sitting in the creek, with clothes on, soaked, to keep body temperature normal.
These sands on a beach near the campground are bathed in light reflected off the towering walls carved by the river.
Looking at the Rocky Mountains out the car window. Near Leadville.