The gateway from the open courtyard, or prakaram, leads to the Maha Mandap, a spacious and ornately decorated hall that serves as the main entrance to the inner sanctum of the temple. Flanking either side of the Maha Mandap are broad passageways that guide devotees to the inner prakaram, a circumambulatory path that encircles the garbhagriha, or sanctum, where the presiding deity resides. Before entering the sanctum, one's gaze is drawn upward to a breathtaking sculpture of Mahavishnu, depicted in his iconic reclining pose, serenely watching over all who pass beneath him into the sacred space. At the heart of the sanctum lies the Shiva Linga of Sri Vada-Moola Nathar, a one-of-a-kind Linga fashioned from the sands of a snake-pit, its delicate nature protected within a pot-like covering known as a 'kuvalai'. To the right of the in-between Mandap lies a spot of great spiritual significance, marked by the presence of 'Thavasamman', where Goddess Parvathy is said to have performed her tapas, or spiritual austerities. As one circumambulates the sanctum, a series of sannidhis, dedicated to various deities and spiritual figures come into view, including the Saptha Rishis, Umai Bangar, Saptha Matha, Kasi Viswanathar, Visalakshi, Pancha bhootha Lingas, GajaLakshmi, Kala-Samhaara Murthy, and Gaja-Samhara Murthy. The temple's pantheon is further enriched by the presence of 'Goshta Murthas', a group of five deities consisting of Vinayaka, Dakshinamurthy, LingothBhava, Brahma, and Goddess Durga.

A majestic, sprawling banyan tree, revered as the temple's 'sthala vruksham' or sacred tree, stands sentinel outside the temple. The temple's sanctity is further enhanced by the presence of two bodies of water - the Brahma Theertham tank and the meandering river Kollidam, which serve as the 'sthala theertham' or temple tank and river. Legend holds that this sacred site bore witness to the penance of Parashuram, the sixth avatar of MahaVishnu, as he sought to atone for the grave sin of matricide committed at the behest of his father, the sage Jamadagni. Interestingly, the neighboring hamlet of Mela-Pazhuvur houses another Shiva temple wherein resides an idol of Parashuram's father Jamadagni himself. The filial connection between the two temple sites is celebrated annually during the auspicious Tamil month of Panguni, when, on the third day of the festival, the deity of Pazhuvur is ceremoniously transported in a grand procession to Mela-Pazhuvur to be symbolically presented before the paternal figure of Jamadagni.