People living in Colorado make use of a plate code that reads 001-AAA-999-ZZZ. Ranked 21st in the US, the state has a population value of 5,540,545 in 2016. The state is popularly known to a several geographical diversities. It contains arid plains, alpine mountains, and deserts. There are granite rock formations, sandstone, deep canyons, lush forests, lakes and rivers. Colorado is amount the mountain regions of the US classified as a southwestern and western state. With tons of places to visit in Colorado, you may decide to check out Breckenridge, Creede, Crested Butte, Cripple Creek, Estes Park, Georgetown, Manitou Springs and Ouray.