Mangaladevi Temple is a 1000-year-old temple inside the dense forests of the Periyar Tiger Reserve. Made of huge pieces of granite, it stands at an altitude of 1337 m above the sea level. The temple is open to devotees only once a year during the month of April – May for the Chithrapournami celebrations. On this full moon day, priests of Tamil Nadu and Kerala conduct ritualistic prayers at the temple.Situated on the northern boundary of the Periyar Tiger Reserve, the temple can be reached only by jeep. There is a 12-kilometer stretch to be covered through dense forests and high altitude grasslands to reach the temple. The surroundings of the temple are known for their pristine beauty. A wide variety of flora and fauna can be found in the area including the highly endangered Nilgiri Tahr. The Tahr is the state animal of the State of Tamil Nadu. The place is also known for the endemic orchid species, Habenaria periyarensis.Hidden in the dense forest of Periyar Tiger Reserve, between Kerala and Tamil Nadu, the Mangaladevi Temple at Thekkady is not just a place for pilgrimage tourism, but a place where you can find the wildness of the forest and the enchanting beauty of the nature. The temple is located 7 km away from Pazhiyankudi in Theni district and 15 km from Thekkady in Idukki district.