The Vault is a room in the Chozo Ruins in Metroid Prime. As the name implies, the Vault contains a Missile Expansion in a large, sealed-off chamber at the room's center. The only other thing of interest in this large, square room is a piece of Chozo Lore on one of the walls alongside the vault itself. To open the locked chamber, Samus must activate three Bomb Slots embedded in the gate. However, two of these are elevated above ground level, so both a Bomb Jump and Double Bomb Jump are needed to open the gates. The lower two are also sealed; the panels blocking the slots can be removed with Bombs.