Yuma Territorial Prison State Historic Park preserves the prison that held some of the Arizona Territory's most notorious criminals between 1876 and 1909. Perched on a bluff above the Colorado River, the site is one of the most recognizable historic landmarks in Yuma. Original cell blocks, a guard tower and a museum give visitors a detailed look at daily life for inmates and guards. The stories of the prisoners and the tough conditions they faced add depth to the experience, and the river views provide a striking backdrop. Admission is $10 for adults and $5 for youth. It is a fascinating stop for anyone interested in the Old West.