These extraordinary earthen fortresses, built by the Hakka people between the 12th and 20th centuries, represent some of China's most unique architecture. The circular and rectangular Tulou structures could house up to 800 people each, functioning as self-contained communities with living quarters, storage, temples, and defensive features. Constructed from rammed earth, wood, and stone, these massive buildings have withstood centuries of earthquakes and attacks. The Tianluokeng cluster, known as the "Four Dishes and One Soup" due to its layout, offers particularly stunning views. Located in the mountainous regions of southwestern Fujian, this UNESCO World Heritage site provides a fascinating window into communal Hakka culture.