Near the viewpoint is one of the fields of the Siam Tulip (Curcuma alismatifolia), called Dok Kra Jiao (ดอกกระเจียว) in Thai. The dipterocarp forests bloom with the purple flowers at the beginning of the raining season in July.
The park got its name from the strange rock formations in the Hin Ngam Rock Ground, located at the western end of the park. Erosion has carved several large rocks into striking and unusual shapes.