Agastyarkoodam or Agastya Mala is the second highest peak in Kerala. This forested peak, an ideal trekking destination in the Western Ghats is 70km away from Trivandrum. It is accessed only on foot as tourists has to trek 24 km from Bonacaud, base camp of Agastya Mala. The 1868 m peak is the abode of the Hindu sage Agastya, who is one among the Saptarishis. Many Kerala as well as Tamilnadu rivers originate from the hill. Some of them are Kallada River, Achankoil River, Karamana River, Neyyar River, Thamirabarani River and Manimuthar River.
Agasthyamala Biosphere Reserve, covers 23 sq km, is an important tourist attraction here. It is repository of medicinal plants and rare herbs. A valuable and rare herb ‘Arogyapacha’ (plant of eternal health) is spotted here. Agastyarkoodam is being called as a bio diversity hotspot .The peak is home to many endangered mammals including the Lion-Tailed Macaques, Bengal Tiger, Nilgiri Marten, Malabar Spiny Dormouse, Great Pied Hornbills, and Sloth Bear.