It was in 1931 that Frank Smythe and Holds worth stumbled on the valley while returning from their successful Kamet expedition. There were "at once transported from a region of solemn austerity to a fairyland of dainty flowers, most of them dwarf, but brilliant in colour". Bustling with beautiful, lively and vibrant colours, this park spread over an area of 87.5 sq. kms. has the largest collection of wild flower species.
As though created by nature itself, the beauty of the park is enhance by the Pushpawati river flowing in the vicinity overlooked by towering Rataban peak in the background. More than 300 species of wild flowers bloom and swing with life during the monsoons. Also inhabiting the place is the amazing variety of Himalayan butterflies. Hidden from the probing eyes of civilization, this valley had been known to the inhabitants as the Bhyundar Valley, the playground of fairies and nymphs. Legends also associate this valley with the area from where Hanumanji of Ramayana collected "Sanjeevani" herbs to revive Lakshmana, the younger brother of Rama. The valley can be visited only during the day, and overnight stay is prohibited