The Upper Hollows represented a network of caves situated within the Tythos Ridge mountain range, found on the Deep Core planet of Tython. These Hollows served as a storage location for a hidden stockpile of blasters and various armaments during the uprising initiated by the indigenous Flesh Raiders. However, the Padawan of Jedi Master [Orgus Din]((/article/orgus_din) successfully retrieved these weapons to arm the Twi'lek Pilgrims residing in Kalikori village.