Karaikal Ammaiyar Temple is located on the Barathiar Street in Karaikal
. It is dedicated to a shaivite saint, Punithavathi, who is the only woman among the 63 Nayanmars. According to a local legend, Lord Shiva
once appeared in disguise of an ascetic seeking alms from Punithavathi.
A festival named Mangani is held here annually during June-July.