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