waterfall. Upon reaching the waterfall, there is a staircase going down about 50 meters, which is quite narrow and steep. In the rainy season, there will be a lot of rain water but in the dry season, there will be few to no water falling down the cliff. Pha Kluai Mai Waterfall (น้ำตกผากล้วยไม้) Pha Kluai Mai Waterfall gets its water source from Huai Lam Takhong. To get there, you have to park your car at Pha Kluai Mai tent yard and walk on. The waterfall gets its name from the abundance of orchids present there. Haew Su Wat Waterfall (น้ำตกเหวสุวัต) This waterfall gets its source from the Huai Lam Takhong flowing through a 25 meter high cliff. The basin of the waterfall is suitable for swimming, however, the national park prohibits swimming due to fear of turbulent flood waters. In the rainy season, the falling water will make a scattered mist of water vapor. In the dry season, the waterfall will recede, revealing a shortcut into a small cave under the waterfall cliff. One urban legend reports that Haew Su Wat was named after a thief named Suwat who, in order escape government authority, jumped into the basin. However, there's no verifiable proof of this actually happening so the origin of the name is currently unknown. Visitors According to the Department of National Parks (DNP), which manages the park, visitors to Khao Yai have risen from 671,569 in 2008 to more than 1.2 million in FY2016. From October 2015 to September 2016, 471,514 vehicles entered the park. The congestion has led to demands to close the park to private vehicles. During one of its busiest periods, New Year's week from 30 December – 3 January 2016, the park received 156,574 visitors. They left in excess of 23 tonnes of waste behind. As litter was a serious problem at the park, in 2020 the park started mailing litter to the homes of visitors who left it there. Climate Khao Yai National Park has three main seasons, with an annual mean temperature of 23° Celsius, though this varies greatly with the seasons. Rainy season (May–October): Most days have high rates of precipitation. The atmosphere is humid with average temperatures of 27 °C during the day dropping to 13 °C at night. Streams at peak flow. Cool season (November–February): Clear skies, sunny and cool. Average temperatures of 22 °C during the day and