Nahm Tok Chet Sao Noi National Park covers an area of about 28 km² and stretches out over two provinces, i.e. Saraburi and Nakhon Ratchasima.

The park's river, known as Muak Lek (มวกเหล็ก) and featuring seven tiers of low level waterfalls, in this place actually forms the provincial border between the two regions.

These seven tiers stand a the origin of the park's name, as Chet Sao Noi (เจ็ดสาวน้อย), means ‘Seven Little Girls’.