Agasthyarkoodam, a prominent peak of the Western Ghats, is in the form of a sharp cone. It is about 1869 metres above sea level. This peak, a pilgrim centre of the Hindus, according to tradition was home to the great sage Agastya, who was a confirmed bachelor. Hence, the aborigines dislike the presence of women on the hill. Women are not allowed up the peak.

Agasthyarkoodam is 70 km from Thiruvananthapuram. The place is famous for its abundant ayurvedic herbs and medicinal plants. Another major attraction of this spectacular peak is the Neelakurinji, a flower which blooms only once in twelve years. A forest pass has to be obtained from the Wildlife Warden at the Forest Department for trekking.