I prefer to quote THIRUVALANGADU (near Arakonam) where Karaikkal ammayar moved in Peyuru (Ghost) and Siva + Sivakami redid the dance duo exclusively for her !
And nearby Pazhayanur (Neeli fame - which Neeli avenged her previous birth killing and the Panchyat which vowed to protect the fellow - ex. lover of Neeli - set themselves ablaze, for having failed)!
I visited the temple even last Arudhra and read the Thevarams hymned over there ..
There is - to quote Dr. Jaybee - an eerie feeling in that area !
Checked with Scholars who did exclusive books on these places.. they do concurr ..