Subak (irrigation) - Credit: Wikimedia Commons
Subak is the water management (irrigation) system for the paddy fields on Bali island, Indonesia. It was developed in the 9th century. For the Balinese, irrigation is not simply providing water for the plant's roots, but water is used to construct a complex, pulsed artificial ecosystem. The system consists of five terraced rice fields and water temples covering nearly . The temples are the main focus of this cooperative water management, known as subak. Read more on Wikipedia
Source: en.wikipedia.org