Arakandanallur Arulmigu Athulyanadheswarar Temple (historically known as Thiru Araiyani Nallur) is an extraordinary hilltop rock-cut sanctuary and the 12th holy Paadal Petra Sthalam in the historic Nadu Naadu region of Tamil Nadu. Perched majestically atop a massive granite rock hill overlooking the South Pennai River near Thirukoilur, this ancient temple is famous across Indian spiritual history as the site where the Pandavas resided during exile and where Bhagavan Ramana Maharshi experienced a divine pillar of light in 1896 guiding him to Arunachala.
Enshrined in the 7th-century Tamil Tevaram hymns composed by child-saint Thirugnanasambandar, the temple derives its name Athulyanadheswarar (Incomparable Lord / Oppilaanathar) from Lord Shiva's peerless brilliance. The hilltop complex features a ancient Rajagopuram, an inner sanctum housing the Swayambhu Lingam atop the natural rock ridge, a dedicated shrine for Goddess Azhagiyaponnamman, five rock-cut Pandava caves (Pandava Guhai), and panoramic views of Mount Arunachala visible in the northern horizon.