This is the abandoned Scientology base in Sweeney Ranch, Wyoming. In 2009 when the local government learned from neighbors that the Scientologists were digging a large vault into the hillside without the proper permits, they shut down the project. The building materials were left on the site rather than paying to truck them away. The damage done to the hillside was never restored. The ranch is now used to graze cattle.
Wikipedia cite:
{{cite news | author = Angry Thetan | title = Scientology Abandoned Sweeney Ranch Vault | url = https://www.youtube.com/watch?v=VSsqYtjyRqc | work = YouTube | date = September 1, 2017 | accessdate = September 1, 2017 }}
Scientology Abandoned Sweeney Ranch Vault September 1, 2017,
Scientology Abandoned Sweeney Ranch Vault September 1, 2017,