J.R.R. Tolkien's "Middle-earth" is a fictional world that serves as the setting for his famous works, including "The Hobbit" and "The Lord of the Rings." It features a rich landscape filled with diverse regions such as the peaceful Shire, the dark Mordor, and the majestic Rivendell. The world is inhabited by various races, including Hobbits, Elves, Dwarves, and Men, each with their own cultures and histories. Middle-earth is characterized by its deep mythology and languages, many of which Tolkien created himself. The stories often revolve around the struggle between good and evil, exemplified by the powerful One Ring and its corrupting influence. Tolkien's detailed maps and lore have made Middle-earth a beloved and enduring part of fantasy literature.