Tamilnadu has some hidden gems which are a must to visit.
Topslip
Meghalamalai
Valparai
Coonoor
Suruliyar and kodhayar
Dhanushkodi
Kolukkumalai
Yercaud
Hogenakkal
Yelagiri
Kolli hills.
There are towns like
Rameshwaram
Kanyakumari
Tirunelveli
Gangai konda chozhapuram
Karaikudi
Pollachi
Kumabakonam
for some temple architecture, nature and best weather especially from November to March.