Just came back from Tiruvannamalai trip – http://www.tiruvannamalai.tn.nic.in/
Got a chance to visit the ARULMIGU ARUNACHALESWARAR TEMPLE (http://www.arunachaleswarar.com/eArunaStructure.html) and RAMANASRAMAM, awesome place.
Best experiance is watching Tamil move in the TNSTC bus. 🙂
Only concern was when coming back to chittoor – heavy rush in train and no road transport due to Andhra band :-(.