Sai Yok National Park is one of the most famous national parks in Kanchanaburi Province, covering over 500 square kilometers of forest in Sai Yok and Thong Pha Phum districts. It lies within the Tenasserim Mountains, a large, continuous forest area in western Thailand. The majority of the land consists of dry evergreen forest, mixed deciduous forest, and bamboo forest, interspersed with limestone mountains and the important Khwae Noi River. This makes the area rich in natural resources, wildlife, and a significant ecosystem for western Thailand. Sai Yok National Park was officially established in 1980 and remains a popular destination for nature and history enthusiasts.

The most important highlight of Sai Yok National Park is "Sai Yok Noi Waterfall," also known as "Khao Chon Waterfall." This waterfall is unique because the water cascades from a high cliff directly into the Khwae Noi River, creating a beautiful and rare natural spectacle. Tourists enjoy walking across a suspension bridge to admire the waterfall from a wide angle, as well as relaxing on a raft along the river to experience the natural atmosphere up close. Sai Yok Noi Waterfall has water flowing year-round. However, the waterfall is most beautiful and has the highest water volume during the rainy season, between May and October. Furthermore, the area around the waterfall was once visited by King Chulalongkorn (Rama V) in the past, making Sai Yok Waterfall widely known among Thais since the early Rattanakosin period.

Beyond its natural beauty, Sai Yok National Park also holds historical significance due to events during World War II. This area was once part of the "Death Railway," built by the Japanese army to connect Thailand and Burma, using a massive number of prisoners of war and laborers. Today, many historical remnants remain, such as the original railway line, a steel bridge, remnants of a Japanese military camp, and the Nam Tok railway station, which has become a major tourist attraction in Kanchanaburi province. The story of the Death Railway makes Sai Yok National Park more than just a natural tourist destination; it also reflects an important historical event in Southeast Asia during the World War.

Another highlight of the park is "Tham Lawa," considered one of the largest and most beautiful limestone caves in Kanchanaburi. Inside, the cave is divided into many chambers, featuring uniquely shaped stalactites and stalagmites that have been naturally formed for millions of years. Some of the formations resemble rock curtains, pillars, or grand halls, creating a magnificent sight. Tham Lawa Cave is located on a hill overlooking the Kwai Noi River. Tourists must cross by ferry and climb a short flight of stairs before reaching the cave entrance. The surrounding area remains tranquil and natural, ideal for those seeking to experience the pristine forest and limestone mountains within the Sai Yok National Park.

Sai Yok National Park offers a variety of tourist activities, including bamboo rafting, floating raft accommodations on the Kwai Noi River, kayaking, nature walks, and nighttime wildlife viewing. Many tourists prefer staying in floating resorts along the river, a unique feature of tourism in Sai Yok district, allowing them to experience the river, forest, and cool, refreshing air up close. Along the Kwai Noi River, there are numerous natural viewpoints and nearby attractions, making Sai Yok National Park an ideal destination for family relaxation, nature tourism, and historical learning all in one trip.

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How to Get There

• By Car: From Kanchanaburi city center, take Highway 323 (Kanchanaburi-Thong Pha Phum) to approximately KM 82. Turn left at the junction leading to the park headquarters.

• By Public Transport: Take a bus bound for Thong Pha Phum or Sangkhlaburi from Kanchanaburi Bus Station. Get off at the park entrance and take a local taxi or walk to the headquarters.

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Travel Tips

• Visit during the cool season for pleasant weather and clearer scenery.

• Wear non-slip shoes when walking near waterfalls and wet trails.

• Early morning is the best time for photography and fewer crowds.

• Book floating raft accommodations in advance during peak seasons.

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Admission Fees:

• Thai Nationals: Adults 60 THB, Children 30 THB 

• Foreigners: Adults 300 THB, Children 150 THB (Prices subject to change per park regulations)

Opening Hours:

• 08:00 AM – 04:30 PM (Daily)