The Twelve Mounts were a series of mountains surrounding Castle Pradeux and the Naval Academy on Prefsbelt IV. Each named for a great naval battle, the Twelve Mounts dwarfed Castle Pradeux. Deep within the mountain range was the Naval Crypt, where the body of the "Father of the Navy" Admiral Pers Pradeux was entombed. The Incline of the Twelve Mounts was dotted with monuments and historical artifacts. Below the range was Prefsbelt Green.