Olundiyapattu Arulmigu Arasaleeswarar Temple (historically called Thiru Arasili) is an ancient Shaivite shrine and the 31st holy Paadal Petra Sthalam in the Thondai region of Tamil Nadu. Tucked away in a tranquil rural setting near Kiliyanur and Tindivanam in Villupuram district, this sacred temple derives its divine name from the holy Arasa Maram (Peepal Tree / Ficus religiosa), under which Lord Shiva manifested Himself as a self-born (Swayambhu) Lingam to bless Sage Agastya.
Glorified by the child-saint Thirugnanasambandar in the 7th century CE Tevaram hymns, the temple features a classic Dravidian single-praharam layout, a sanctum housing the Swayambhu Arasaleeswarar Lingam, a separate east-facing shrine for Goddess Periyanayaki, and serene temple tanks (Agastya Theertham). Devotees visit this shrine to seek relief from chronic health ailments, obstacles to marriage, and to perform special penance under the ancient sacred Arasa tree.