The Greatest Lost City in Asia — Why Angkor Disappeared After 1431 AD

🔔 Subscribe for more lost civilizations, forgotten empires, ancient engineering, and hidden history from the ancient world. 🏛️🌿 How did the greatest city in Asia disappear into the jungle after 1431 AD? At its height, Angkor was home to nearly one million people, making it the largest pre-industrial city on Earth. Its massive temples, enormous reservoirs, and sophisticated water management system sustained one of history's greatest empires. Yet after the fall of Angkor in 1431 AD, the royal capital was gradually abandoned, and the surrounding jungle slowly reclaimed what had once been the heart of the Khmer Empire. This documentary explores the rise and fall of Angkor, the engineering marvels that made the empire possible, the climate changes, wars, and political shifts that contributed to its decline, and the astonishing rediscovery of the lost city centuries later. Discover how one of humanity's greatest urban achievements vanished beneath the forests of Cambodia—and why its mysteries continue to captivate archaeologists today.