The Siva temple at Thirunakkara is located in the heart of Kottayam town at a distance of 1.5km on the Ernakulam- Thiruvananthapuram railway line. The 500year old temple was constructed by Thekkumkoor Maharaja in the Kerala architectural style. The walls of the temple are decorated with colourful paintings and the sanctum santorium with pictures from Hindu epics . Dhara and Chathu-satha are the main offerings here. The temple is opened from 5am to 12 noon in the morning and from 5pm to 8 pm in the evening. 

A cultural center 'Koothambalam', located within the temple compound, is considered as the best in Kerala. Three festivals are celebrated in the Thirunakkara Mahadeva temple in the month of Thulam (Oct-Nov), Mithunam (June-July) and Meenam (March-April) of which the last one is the most important. There are also subsidiary shrines dedicated to Lord Ganesha.