Middle-earth locations
Isengard is a fortress at the southern end of the Misty Mountains. It is in a small valley inside a ring-shaped wall. The wall is called, the Ring of Isengard. In the fortress is a tall black tower, Orthanc. Isengard belonged to Gondor but in the 28th century it was given to Saruman. The fortress has a palantír. A palantir is ball made of indestructible crystal that is used for communicating with other places.  In the War of the Ring, ring-wall was destroyed by the Ents. After the War, the tower Orthanc was given back to King Elessar and the Reunited Kingdom.