The Inca Empire, located by Lake Titicaca, enjoyed a pleasant climate and advanced agriculture. However, this magnificent empire mysteriously vanished overnight, leaving behind countless unsolved mysteries. The Incas worshipped the sun god and had a sophisticated political system and technology. They excelled in agricultural techniques and made significant achievements in textile production. Yet, the empire's prosperity attracted greedy eyes—Spanish conqueror Francisco Pizarro's arrival drastically changed the fate of the Incas. In 1532, Pizarro conquered the Inca Empire by force, imprisoning the emperor and plundering vast amounts of wealth. In the city of Cusco, palaces and temples lay empty, and even the beautiful women of the 'nunnery of the sun' had vanished without a trace. How did the Incas disappear overnight? Some speculate that they may have sunk their gold and silver treasures into Lake Titicaca, while others believe they could have fled to the Andes mountains to escape the Spanish pursuit. However, these theories struggle to explain how such a large population could vanish in such a short time. To this day, this mystery continues to perplex historians.