Isengard

Isengard was a city and its surrounding fortifications in J.R.R. Tolkien's Middle-earth, located in a valley between Rohan and Fangorn. At the center of the city is a tower known as Orthanc which appears to consist of natural pillars of rock, but was in fact fashioned by cunning hands many centuries before. During the Third Age, it was inhabited by Saruman the White, from whom is derived the valley's name of Nan Curunír, Curunír being the elvish equivalent of Saruman.

Isengard is the city's name in the language of Rohan. It is a translation of the Sindarin name Angrenost meaning "Iron Fortress".

According to Tolkien The Two Towers of the second book of The Lord of the Rings are Barad-dûr and Minas Morgul. However, in Peter Jackson's movie The Lord of the Rings: The Two Towers Minas Morgul is not mentioned, and so Orthanc became the second Tower of the title.