The Chao Phraya River is the main river in Thailand, flowing through the capital city, Bangkok. It originates from the confluence of the Ping and Nan rivers in the northern part of the country and travels southward for about 372 kilometers before emptying into the Gulf of Thailand. This river is vital for transportation, trade, and agriculture in the region. It supports a diverse ecosystem and is lined with important landmarks, including the famous Wat Arun temple and the Grand Palace. The Chao Phraya also plays a significant role in the daily lives of the local population.