Mangala Devi temple is a historic temple situated in the dense forests of Periyar Tiger Reserve in the Idukki district of Kerala bordering Tamil Nadu State. The fable prevalent among the natives elucidates that Kannagi, a devout Tamil woman, had wreaked destruction on the Pandyan dynasty through her curse for unjustly executing her husband, Kovalan in a theft case.
Kannagi is extolled as the epitome of chastity and is bestowed the position of the goddess. The ancient Tamilakam King, Chera Chenguttuvan, constructed this temple, around 2000 yrs ago. So, the temple is known for Pandiyan architecture.
Apart from Mangala Devi, the idols of Lord Shiva, Lord Karuppuswamy and sanctorium of Ganesh adorn the temple.Only during Chitrapournami festival, which falls in the Summer season (April/May), the devotees can visit and offer the prayers. The 12 km stretch to the temple can be accessed only through Jeep.To visit the Mangala Devi during other times prior special permission must be sought from the forest ranger.