Khaoyai National Park is the third largest in Thailand, covering an area of 2,168 square kilometers. On July 14, 2005, Khaoyai National Park, together with the Dong Phaya Yen mountains further north was inscribed as a UNESCO World Heritage Site.   This national park is not as well maintained as the ones in the US or Australia, and the driving signages are not very clear, but it has a unique rustic feel. We drove in to visit 2 waterfalls – Haew Narok and Haew Suwat. Tip: If you are googling for locations of these waterfalls to drive to, type “Heo”, “Haew”, “Haeo”. Many different platforms spell it differently. Haew Narok Waterfall (น้ำตกเหวนรก) is the largest and highest waterfall in the park. While the signboars says this is only 1 kilometre walk from the main road to the viewpoint, my endomondo said I burnt 580kcal because it is a steep flight of stairs in the last 300metres, which also means quite a climb when you are coming back up! But worth the exercise, the waterfall has considerable strength. Haew Suwat Waterfall (น้ำตกเหวสุวัต) is a famous waterfall (I believe …