At a distance of 40 Kms from Pathanamthitta, Nilackal, located on Pathanamthitta - Pampa route, on the way to Sabarimala is famous for Mahadeva Temple and Marthoma Sleeha Church.
The Mahadeva Temple dedicated to Lord Siva is one of the famous Siva temples in this area. It is located on the banks of Pampa River.
The Marthoma Church dedicated to St. Thomas is believed to have been constructed in 54 AD by S. Thomas himself. It is also known as Arapally (half completed church), and it is one among the 7 and half churches founded by the Apostle Thomas. However, the old church was completely destroyed and a new church was constructed near by.