Aztec Ruins National Monument, New Mexico by kevinrussmobile. Early American settlers mistook the ruins as Aztec. They actually were constructed by the Anasazi in the to centuries. The ruins are a UNESCO World Heritage site.
Impressive aerial view of Hoover Dam. For those who don't know: Hoover Dam, once known as Boulder Dam, is a concrete arch-gravity dam in the Black Canyon of the Colorado River, on the border between the US states of Arizona and Nevada