It is a part of Anamalai Tiger Reserve. It is surrounded by a green grass environment.
It is a beautiful site of high green grasses on a mountain slope, which is a protected area. Visitors have to obtain permission from the wildlife warden to enter the Grass Hills. It is situated at a distance of 15 km from Valparai town. Grass hills is a picturesque spot located in the Valparai hills range, at a height of approximately 2400 ft msl, with cool climate getting cooler at night, a part of Anamalai Tiger Reserve. Right now all efforts are being undertaken by the government to preserve the flora and fauna of this location. Nilgiri Thar is native of this place apart from Elephants, Bison, Indian Gaur, Bear, Nilgiri Langur etc. and a wide variety of birds including Hornbills.