Spanning the forest of Umphang Wildlife Sanctuary in Thailand, the Thi Lo Su is a massive waterfall that spills water from a height of 250 meters. It is even taller than the Niagara Falls and is the largest in Thailand, and sixth in the world, with a width of 450 meters. It is spectacular because of its many cascades, and its vast stretch of powerful waterfalls that only an aerial photo can capture all of it. The sanctuary is a UNESCO World Heritage Site, located in Tak Province (Wikipedia Article) in Northern Thailand, which connects with other three major national parks and virgin forests: the Khlong Lan National Park (Wikipedia Article), Mae Wong National Park, Thung Yai Naresuan Wildlife Sanctuary, and Huai Kha Kaeng Wildlife Sanctuary. All of them combined form the largest wildlife sanctuary in Thailand.