Ahch-To is an aquatic planet with numerous islands which served as the origin for the Jedi and, among these islands, the Temple island is the location of the first Jedi Temple. Lanais act as Caretakers to maintain Temple island's ancient structures and provide care for travelers. Porgs are also native creatures of the planet.
It was also home to Jedi Master Luke Skywalker, who went into self-exile seeking the Ahch-To Jedi Temple after most of his new generation of Jedi Knights were killed during the destruction of his Jedi Temple in the same night Ben Solo fell to the dark side.
