Agasthyarkoodam is a 1,868-meter tall top(peak) inside Neyyar Wildlife Sanctuary, Kerala. However, the pinnacle lies in the border of Kerala and Tamil Nadu. This pinnacle is a piece of the Agasthyamala Biosphere Reserve which lies on the border between the Indian conditions of Kerala (in Pathanamthitta, Kollam and Thiruvananthapuram regions) and Tamil Nadu (in Kanyakumari area, Tirunelveli region). The enduring Thamirabarani River starts from the eastern side of the range and streams into the Tirunelveli area of Tamil Nadu. 

Agasthyarkoodam is a journey place for the devotees of the Hindu sage Agastya, who is viewed as one of the seven rishis (Saptarishi) of Hindu Puranas. In Tamil conventions, Agastya is considered as the father of the Tamil language and the compiler of the main Tamil grammar called Agattiyam or Akattiyam and furthermore the Malayalam language is viewed as conceived from Agasthya. There is a little stone statue of Agathiyar at the highest point of the pinnacle and the devotees can offer pujas themselves. 

Agasthyamala Biosphere Reserve is among 20 new locations added by UNESCO to its World Network of Biosphere Reserves in March 2016. The International Co-ordinating Council included the new destinations amid a two-day meeting on March 19, 2016 in Lima, bringing the all out number of biosphere stores to 669 locations in 120 nations, including 16 transboundary destinations. 

Agasthyarkoodam is 32 km from Neyyar Dam and 23 km from Bonacaud, close Ponmudi. The real city and airplane terminal closest to Agasthyarkoodam is Thiruvananthapuram (Trivandrum) and its Trivandrum International Airport, around 61 km away and the closest rail stations are Thiruvanathapuram, Kerala and Ambasamudram, Tirunelveli District, Tamil Nadu. The trekking way, almost 35 km, is from Bonacaud. 
Kalakkad Mundanthurai Tiger Reserve is a piece of the Agasthyarkoodam extend. Some portion of the pinnacle can be seen from the Upper Kodayar locale.