Thiruvallam Sree Parasurama Temple
Thiruvallam Sree Parasurama Swami Temple is one of the most ancient temples of South India. It is situated on the banks of Karamana River near Thiruvallam, Thiruvananthapuram. It is the only temple in Kerala dedicated to Lord Parasurama. It is considered one among the 108 Abhimana Kshethram of Vaishnavate tradition. The temple is 6 km from Kovalam Beach and  5 km from Trivandrum International Airport and  3 km from Thiruvananthapuram.3 km from Attukal Temple 2 km from Pazhanchira Devi Temple and 1 km from Sree Alukadu Devi temple. This heritage structure is placed under the list of monuments of national importance. From Eastfort Bus stand frequently Kerala state Road Transport Corporation buses are frequently plying towards the temple. The head of Padmanabhaswamy was seen in this temple and the feet at Tripadapuram Mahadeva temple. The body of the swami is seen in the Ananthapadmanabhaswamy temple. These 3 temples are visited in one go. Legend
the lands of Kerala were recovered from the sea by the axe-wielding warrior sage Parasurama, the sixth avatar of Vishnu (hence, Kerala is also called Parasurama Kshetram 'The Land of Parasurama' in Hindu mythology). Parasurama threw his axe across the sea, and the water receded as far as it reached. According to the legendary account, this new area of land extended from Gokarna to Kanyakumari. The land which rose from sea was filled with salt and unsuitable for habitation; so Parasurama invoked the Snake King Vasuki, who spat holy poison and converted the soil into fertile lush green land. Out of respect, Vasuki and all snakes were appointed as protectors and guardians of the land. History
It says that the temple was built during the 12th and 13th century, late Pandyan period. The temple is considered a protected monument by the Archaeology Department of Kerala. It is famous for Balitharpanam (a tribute to ancestors) also called as Shrardham. During the karkidaka vavu day (a holiday in the Malayalam month of karkidakam) as part of the bali (a religious ritual), devotees pay homage to the departed souls of forefathers, after taking a dip in the holy water. This Temple is said to be built by the Brahmins Primarily for Lord Parashurama as he gave these lands to them as Dhanam. References

Hindu temples in Thiruvananthapuram district
Archaeological sites in Kerala
Abhimana temples of Vishnu
Parashurama temples