Parassala Mahadeva Temple is located at Parassala in Thiruvananthapuram district, Kerala. The 10-day temple festival begins on Thiruvathira nakshatra in Medam month with kodiyettam. The festival ends with Arattu on the tenth day.
The rope for the festival flag and items for festival naivedya are given by the Paraiyar family of the Vattavila house. As per the temple history, a woman named Neeli was cutting bamboo and she accidently hit a stone and it started bleeding. It was the Shivling that is now worshipped in the Parassala Mahadeva temple.
This is one of the Mahakshetram in the southern end of Kerala. The Shivling in the temple is huge. The deity faces west. The main upa devata in the temple is Ganapathy. The temple is located inside a huge compound wall. The temple is square in shape. In 1740, Mallan Chempaka Raman Pillai, Dalawa of Thiruvithamkoor, renovated the temple and got Brahmin families to reside in the neighborhood of the temple.