Nam Phu Chet Si or Bua Tong Waterfall
47 kilometres from Chiang Mai, on the road to Phrao. The spring water is rich in calcium carbonate, which is deposited on the streambed and flows down the falls in seven distinct pastel colours. A great waterfall to visit with children as it is very safe to clamber and climb on as the lime stones are not slippery. Not particularly spectacular to look at but fun for a picnic.