Thiruengoimalai Arulmigu Maragathaleswara swami Temple lies 40 kms from Tiruchirappalli and 5 kms from Musiri, Taluk headquarters in Tiruchirappalli District. Thiruengoimalai lies between Musiri and Thottiam. The hillock is otherwise called Maragathamalai / Thenkailayam / Sivasakthimalai / Malaikovil / Erattaimalai. Name of the Goddess is Maragathambigai / Maragathavalli. God is also named as Maragathasalanathar/ Malaikozhundar / Achutheeswarar / Birameswarar / Indreekarar / Threethar.

The river Cauvery passes nearby the hillock. The river 'Surpanathi' passes adjoining the hillock. The river is otherwise called Kondayurumarai or Kondamarai. The name is said to be a corruption of Thiru-i-ongaimalai ('the' holy high bees 'mountains')and to have been so called because the sage Agastya , finding the gates of the Siva temple closed one evening, turned himself into a bee and so obtained entrance to perform his worship. The lingam of the temple is said to be transparent and also to throw a green shadow when camphor is burned. It is therefore called the ('Emerald') Maragathalingam.The god is connected with the deities of kadambarkovil and Ratnagiri. At all these three temples Mondays in Karthigai and the Taipoosam day are special holy days. The temple is sung in Devaram also. At the base of the temple lies Bogar Sidha temple. 500 vertical steps lead to the temple at the top of the hillock. Poet Nakkeerar has sung a booklet named Eengoi-Ezhupathu ( 70 Eengoi songs)