Thirunelvayil Arathurai Arulmigu Theerthapureeswarar Temple (also known as Tiru Arathurai) is the premier Paadal Petra Sthalam in the historical region of Nadu Naadu. Nestled on the banks of the sacred Niva (Vellar) River near Pennadam in Cuddalore district, this venerable sanctuary is world-famous in Shaivite history as the holy spot where Lord Shiva bestowed a divine Pearl Palanquin (Muthu Sivigai), Pearl Umbrella (Muthu Kuda), and Pearl Bugle (Muthu Chinnam) upon the child-saint Thirugnanasambandar to ease his barefoot pilgrimage.
Immortalized in the 7th-century Tamil Tevaram hymns by Thirugnanasambandar, Thirunavukkarasar (Appar), and Sundaramurthy Nayanar, the temple showcases classic Chola architecture including a five-tiered Rajagopuram, an inner sanctum housing the Swayambhu Lingam of Theerthapureeswarar, a dedicated shrine for Goddess Anandhanayaki, the sacred Banyan tree (Aalamaram), and the serene Neelamalar Poigai water body. Pilgrims visit Thirunelvayil Arathurai to seek relief from physical exhaustion, foot ailments, educational hurdles, and spiritual enlightenment.