Non-Canon Alert! The subject of this article or section originates from non-canonical sources. To find out about what is considered "canon" see LOTR:Canon.
Daemon Angren was a fortress of Mordor, a location invented by the fans who run TheLandOfShadow.com, appearing on at the place at which, on another non-canonical map, a mountain is named simplyAmon Angren.
Daemon Angren was a stronghold built by one of the Nine Ringwraiths when they returned to Mordor before Sauron's return, to rule over southern Mordor below the Mithram Spur, watching over Nurn.