J.R.R. Tolkien's The Lord of the Rings has become an indispensable part of the fantasy canon, spawning related texts, movie and TV adaptations, and numerous video games that let players explore Middle-earth at their leisure. Indeed, part of the enduring appeal of Tolkien's work is his detailed and creative world-building, which resulted in such iconic locations as Mordor, Isengard, and Gondor.