If you are a nature lover, Ooty and Kodaikanal should be top of your list.Other places include Rameshwaram,Coonoor,Tiruchirappalli.You can also visit Pondicherry via Tamil Nadu
Hey,
Start with Chennai - Mahabalibalipuram - Pondicherry - Thanjavur - Rameswaram - Kanyakumari - Madurai - Coimbatore - Ooty.
This would be perfect with the shortest distance covered.
Hey,
there are many places are there but it depends on your intrest,
here are some suggestions for you,
Pondicherry
Must Experiences:
Visit the famous Aurobindo Ashram
Indulge in watersports at Paradise Beach
Savour croissants, baguettes, and other famous French cuisine
Mudumalai
Must Experiences:
Spot tigers, leopards, golden jackals, and more at Mudumalai National Park
Capture the beautiful landscapes
Interact with elephants at the Theppakadu Elephant Camp
Dhanushkodi
Must Experiences:
Unwind and relax at the Dhanushkodi Beach
Savour the gorgeous views from the Adam’s Bridge
Visit the Gulf of Mannar Marine National Park
hope this helpful for you
happy travelling