In this episode of „Planet of Treasures” Christopher Clark explores the cultural wealth of Southeast Asia: Angkor in Cambodia, the old royal cities of Hue in Vietnam and Luang Prabang in Laos. Angkor once was the biggest city in the world, it was about the size of modern-day Berlin. Nowadays the temple city’s ruins are the largest religious monument in Southeast Asia. Ha Long Bay, the world’s biggest cave in Vietnam and Balinese rice terraces prove that nature and culture often go hand in hand.