Namtok Chet Sao Noi National Park

Namtok Chet Sao Noi National Park is a small national park straddling Muak Lek District in Saraburi and Pak Chong District in Nakhon Ratchasima, about 130 km northeast of Bangkok. Established in 2016 as Thailand's 86th national park, it covers 28 sq km of mixed deciduous forest. It is centered on the Chet Sao Noi Waterfall, a low, seven-tier limestone waterfall with shallow pools known for swimming and picnicking.

Visitors can expect a compact forest park centered on the seven-tiered Chet Sao Noi Waterfall flowing over limestone shelves into clear, shallow pools suitable for wading and swimming. The area is shaded by mixed deciduous forest with picnic areas, food stalls, and short nature trails around the falls. Facilities include parking, toilets, and a visitor centre. The park is family-oriented and can be explored on foot via walkways and steps between tiers.

The area was originally established as Chet Sao Noi Forest Park and later upgraded to Namtok Chet Sao Noi National Park on 26 December 2016, becoming Thailand's 86th national park. The park protects a 28 sq km forest watershed and waterfall system in the Dong Phaya Yen mountain range.

The name Chet Sao Noi translates as 'seven little girls', referring to the seven tiers of the waterfall. The waterfall is a long-standing local recreation area for residents of Saraburi and Nakhon Ratchasima provinces.