Rio Grande Colorado River Missouri River Mississippi River
76.5 million 56.5 milion 36.5 million 16.5 million
Unity Temple Cahokia Mounds Charles Mound Rend Lake
Sears Tower AT & T Corporate Center Aon Center Jon Hancock Center
2nd Largest 5th Largest 3rd Largest 4th Largest
176 meters 976 metres 376 meters 576 meters
Gem State First State Prairie State Peach State
Lake Superior Lake Michigan Lake Huron Lake Erie
1931 1961 1871 1901
Ohio River Duck Creek Illinois River Wabash River