Sai Yok Yai Waterfall (Sai Yok Yai Waterfall) is one of the most legendary natural attractions in Kanchanaburi, Thailand, combining historical value and outstanding natural scenery. It is a limestone waterfall with a unique formation, where the water does not fall in multiple tiers like typical waterfalls, but instead flows directly from a high cliff into the River Kwai Noi, creating a rare and dramatic natural view.

Historically, this area was once part of the royal travel route during the reign of King Rama V (King Chulalongkorn), who was deeply impressed by the beauty of the river and forest landscape. This inspiration later led to the composition of the classical Thai music piece “Khamen Sai Yok” by HRH Prince Narisara Nuvadtivongs, which remains famous to this day.

The waterfall originates from natural water sources in limestone mountain ranges and upstream forest areas. The water flows through rock layers before dropping into the River Kwai Noi, creating a humid ecosystem of lush dry evergreen forest surrounding the area. This habitat supports various plant species, small wildlife, and diverse bird species found in nature.

Sai Yok National Park is well-managed with full visitor facilities, including a visitor center, restaurants, campsites by the river, and park accommodations, suitable for different types of travelers, especially those seeking close-to-nature and peaceful experiences.

One of the highlights is rafting and long-tail boat activities on the River Kwai Noi, allowing visitors to enjoy the best panoramic view of the waterfall from the river side while experiencing the natural scenery of mountains and forests along both riverbanks. This makes it a popular destination for both Thai and international tourists.

Sai Yok Yai Waterfall is not just a tourist attraction but a place where nature, history, and Thai cultural heritage come together perfectly, making it ideal for families, groups of friends, and nature travelers seeking a truly unique experience.

• From Kanchanaburi city, take Highway 323 (Kanchanaburi–Thong Pha Phum) for about 100 km. Turn left at the Sai Yok National Park sign, then continue for another 3 km to the park headquarters and parking area. The road is fully paved and easy to access

• Rafting or long-tail boat trips are recommended for the best waterfall view from the river.

• The best visiting period is September–January when water levels are high and nature is lush.

• Bring waterproof clothing and gear if participating in water activities.

• Follow national park rules strictly and avoid littering.

• Suitable for family trips and nature lovers seeking a peaceful atmosphere.

Admission Fee:

Sai Yok National Park

• Thai visitors: Adult 60 THB / Child 30 THB

• Foreign visitors: Adult 300 THB / Child 150 THB

• Car: 30 THB

Opening Hours:

• Open daily from 08:00–16:30 (for day visitors not staying overnight in the national park)