However, during this period, road access to the waterfall is closed for safety reasons and some hiking is required. The peak season for tourism is in December and January when the water level is still high and the road to waterfall (25 km) is open to the public. Only cars with four wheel drive can pass this steep and slippery road. An alternative way to reach the waterfall is by whitewater rafting downstream along the calm section of Klong River and then continuing overland on foot or by car for another about 12 km. Travelling this way, two waterfalls dropping into Klong River can be seen: Thi Lor Jor Waterfall (น้ำตกทีลอจ่อ), and Sai Rung Waterfall (น้ำตกสายรุ้ง). The name Thi Lo Su, in Karen language, means "giant waterfall" or "black waterfall". It is only recently that Thi Lo Re Waterfall (น้ำตกทีลอเร) has been promoted. It is a waterfall dropping directly into Klong River deep in Thungyai Naresuan Wildlife Sanctuary with no road access. Only traveling with tour companies is possible. The journey to the waterfall typically involves white water rafting the Klong River of about 40 km through rapids of Class 4 or 5 while the journey back is by walking or riding elephants. The trip takes two to three days. Pre To Lo Su (น้ำตกเปรโต๊ะลอซู) or Pi Tu Kro Lo Su (น้ำตกปี๊ตรุโกรลอซู) is another recently discovered waterfall. It is on Ma Muang Sam Muen (เขามะม่วงสามหมี่น). Two steams fall to combine to become a heart-shaped waterfall. Travel to and from the waterfall requires a few days of hiking. Some other places of interest are Takobi Cave (ถ้ำตะโค๊ะบิ), a cave formerly used by Communist Party of Thailand;; Doi Hua Mot (ดอยหัวหมด), a viewpoint above the clouds; and Ban Pa La Ta (บ้านปะละทะ), a Karen village dating back 250 years.