Lord Ruler's Storage Cavern (Vetitan)

The Lord Ruler's Storage Cavern in Vetitan stands as a monumental testament to the foresight of the immortal tyrant, concealed behind an Allomancy-locked stone wall in a vast underground expanse stocked with thousands of shelves brimming with preserved food cans, medicines, cloth, water, timber, pulleys, bedrolls, and liquor meticulously prepared for apocalyptic survival. Revealed in The Hero of Ages amid the world's unraveling doom from Ruin's unleashed power, this hidden cache emerges as a pivotal lifeline for humanity's remnants. Though it appears only in the series' finale, its discovery underscores the Lord Ruler's prescient planning, transforming a forgotten relic into a beacon of hope against total annihilation.