Huai Kha Khaeng Wildlife Reserve consists of almost every kind of forest found in Thailand, including mountain virgin forest, dry virgin forest and pine forest. It has a total area of about 2,780 square kilometres. The reserve covers the sub-districts (Tambon) of Rabam and Pa O in Amphoe Lan Sak; Khok Khwai and Kaen Makrut in Amphoe Ban Rai; Thong Lang in Amphoe Huai Khot; and Mae Lamung of Amphoe Um Phang in Tak. The reserve also connects with Thung Yai Naresuan in Kanchanaburi. The unspoiled nature of the reserve makes it an ideal home to various rare and endangered animals such as wild buffalo, rhinoceros, wild elephant, red gaur, tapir, leopard, wild bull, etc. In addition, it is the watershed of rivers flowing to Srinakharin Dam. Due to these attributes, Huai Kha Khaeng Wildlife Reserve was named by UNESCO as a Natural World Heritage Site on 13 December 1991.

Huai Kha Khaeng Wildlife Reserve has 3 points through which visitors can tour the area:

1. The area around the reserve headquarters is in Amphoe Lan Sak, 34 kilometres from the district. The area has an exhibition building and the Sup Nakhasathian Memorial. The Khao Hin Daeng walking nature trail is about 4 kilometres long. There is also the Pong Thian viewpoint.

2. The area around the Cyber Forest Protection Unit in Amphoe Huai Khot is the site of the Huai Kha Khaeng Nature and wildlife Study Centre to be set up by a private organization of Suep Nakhasathian Foundation under the approval of the Royal Forest Department. The centre consists of a study, a nature trail that has direction and information signs, trailside exhibitions, and viewpoints, among others.

3. The area around Huai Mae Di Noi Forest Protection Unit in Amphoe Ban Rai has a nature study walking trail arranged by the Royal Forest Department for educational purposes.

All 3 points are open to tourists who wish to visit the reserve and study nature. For more information, please contact the Wildlife Conservation Division, Royal Forest Department, Tel: 0 2561 4292-3 twenty days in advance or Huai Kha Khaeng Wildlife Reserve, P.O. Box 4, Amphoe Lan Sak, Uthai Thani 61160.

Getting There: There are 2 routes to the reserve:
First route is to enter through the reserve headquarters that is around 102 kilometres from the province. Take the Uthai Thani-Nong Chang road (Highway No. 333) past Amphoe Nong Chang to Highway No. 3438 (Nong Chang-Lan Sak) to Km. 53-54, then turn left onto a laterite road for about 14 kilometres.

Prehistoric colour drawings at Khao Pla Ra is another interesting tourist attraction of Uthai Thani. Khao Pla Ra is a mountain range with verdant jungles, no communities and natural water sources. It is also the home of numerous wild animals. It has truly lovely nature in the area around the cave and cliff in the southwestern part of the mountain at around 320 metres avove sea level. Colour cave drawings stretch for around 9 metres. These prehistoric drawings are of humans and animals in red and black.

They show an agrarian society and are artistic expressions of people in ancient times. The drawings give insight into their lifestyle and homesteads. They are certainly invaluable as artistic heritage of the country. A number of earthenware pieces of three-legged pots and stone axes were also found in the area.

Getting There: From the city, take Road No. 333 past Amphoe Nong Chang, then take Road No. 3438 (Amphoe Nong Chang-Amphoe Lan Sak) for around 21.5 kilometres. You will see the Pla Ra Mountain range on the left. Then turn left onto an asphalt road for about 7.5 kilometres and continue on foot around 2 kilometres up the mountain to the peak to see the prehistoric drawings. The total distance from the city is around 51.6 kilometres.

Hup Pa Tat is a large valley with an area of about 48,000 square metres. The mountain range surrounding the valley is a limestone range. Part of it is Khao Huai Sok that connects with Khao Pla Ra, about 1 kilometre away. The way up to the cave is a margosa forest. Upon reaching the cave mouth you will see a dark cave. After a walk of around 100 metres, you will emerge from darkness and see the way down to the valley. Looking around you will see a limestone mountain surrounded by high cliffs. This enables sunlight to reach the ground only at midday. Therefore, the valley has higher humidity than other parts and this contributes to a wealth of flora. The thick jungle features gigantic shrubs of the genus Excoecaria that are similar to prehistoric trees.

Getting There: Use the same route as Khao Pla Ra. It is 300 metres before the mountain.