The classic U-shape of this valley tells geologists that it was formed by glacial action about 10,000 years ago during the last Ice Age. This is the mouth of "Little Cottonwood Canyon". The valley below is Salt Lake City, Utah. The photo was taken about 30 minutes before the sun was to set. About 6 miles behind me (up the canyon) are the ski resorts, Snowbird and Alta. The granite cliffs you see on the right were quarried for stone blocks about 150 years ago by the Mormon pioneers to build the Salt Lake Temple.
(More stock photography for the weekend: It may not be "pretty", but it sells ;-)