Chidambaram-unique temple and unique hairstyle of "Chozhian" priests.
Gunaseelam-Suchindram near Madurai-Great ancient Anjaneya temple
'Of course the Great Tanjore temple-under UNESCO-clean and majestic
Thiruvannamalai-The great Ramana Maharishi lived there-great temple.
In Chennai itself-the kapaleeswara and the Parthasarathy temples. Even earlier dated-the Keshava perumal temple. Mylapore has great temples.
For great Murukku and Thenkuzhal, the Thiruchendur temple.
Many many, countless in south India. Of course, the unique navagraha temple near kadalur.