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