Completed in 1922, the 1 ½ mile wall surrounding the St. Cloud Prison was built by the prisoners it enclosed. The granite quarry that provided the materials for building the wall is still inside its premises. It’s the longest granite wall in the world, the second longest wall of any kind in the U.S., and it also holds the title of the longest wall in the world built entirely by prisoners.
Contact information: Julianne O’Connell, Stearns History Museum, 320-253-8424, email@example.com.