The Huai Kha Khaeng Wildlife Sanctuary is located in Uthai Thani and Tak Provinces, Thailand. The sanctuary was established in 1974, and is one of the largest and most important protected wildlife areas in Southeast Asia. The wildlife sanctuary was declared a World Heritage Site by the United Nations in 1991. The protected area is home to a diverse range of animals including large mammals, birds, and reptiles. It is Thailand's premier Wildlife research sanctuary.
The Sai Boe waterfall (sometimes pronounced and road signed as "Cyber Waterfall") is one the 3 locations in Huai Kha Khaeng Sanctuary that has open access to the public without need for a permit. The others being the headquarters area and the Huai Mae Dee Forest Protection Unit.
The Sai Boe Protection Unit is quite easy to find and to get there take the Uthai Thani-Nong Chang road (Highway No. 333) past Amphoe Nong Chang to Highway No. 3438 (Nong Chang-Lan Sak) as if you were travelling (and following the sign posts) to "Huai Kha Khaeng Sanctuary".
When you see the left turn to Khao Pla Ra, become a little alert as the next left turn on highway 3438 (which is sign posted for "Cyber" and "E-Sa" waterfalls) is the turning you need. Keep on this new road (Road # 3282) for about 20 kilos until you see the signpost for the turning to to Sai Boe waterfall. A word of warning - the road is tarmac all the way except for one stretch of about 1 km which for some reason cuts through a forest and is a mixture of sand and laterite. You really need a pickup or 4wd to get through this stretch BUT if you are in a saloon you can walk as the entrance and waterfall are only about 1 Km past this track.UPDATE: As of February 2013 the road is tarmac all the way.
Its a 200 baht entrance fee (for us farangs) and the ranger station is very nice and has toilets, salas, stream falls, lawns, etc. The trail to the Cyber waterfall is at the back of the station and its just a short 300 meter or so walk.
The E-Sa waterfall. NOTE this is not in Huai Kha Khaeng but is on the route to the Cyber Waterfall. It is situated behind the E-Sa forest temple/retreat and is quite difficult to find.UPDATE it is well sign posted now
Sai boe waterfall in the hot season, a small trickle but a nice place to laze in the morning before the local tourists and lovers arrive later in the day. A nice place to relax and stalk a few butterflies if you are in the area and are not doing anything else.