Songkran originally was celebrated only in the north of Thailand, and was probably brought there by the Burmese, who adapted it from the Indian Holi festival. It spread across Thailand in the mid 20th century and is now observed even in the far south. However, the most famous Songkran celebrations are still in the northern city of Chiang Mai, where it continues for six days and even longer. It has also become a party for foreigners and an additional reason for many to visit Thailand for immersion in another culture.