New Mexico Colorado Utah California
London Bridge Tower Bridge Tay Bridge Brooklyn Bridge
Petrified Forest Havasu Canyon Monument Valley Grand Canyon
Oil Gold Copper Silver
Cherokee Apache Cheyenne Navajo
Interstate 40 Interstate 8 Interstate 10 Interstate 15
Sonoran Desert Great Basin Desert Mojave Desert Chihuahuan Desert
5.3 million 11.3 million 2.3 million 8.3 million
Mississippi Colorado Rio Grande Missouri