ICBM Silo - Somewhere in Montana

Warning! Do not approach these sites. View them from public roads. If you are driving in Montana and you are in the middle of nowhere and see a chain linked fence with barbed wire on the top surrounding a 1/2 acre piece of land you can be pretty sure it is an ICBM silo. Other give aways are the 12 foot white "pole" which I have read is for security. Also, they all have an electrical pole with two transformers on them. To learn more you can visit the Minuteman Missle National Historic Site in South Dakota or just go to their website.