South India has some great spots to visit. You could start with Kerala by clubbing Munnar Asthamudi Kochi or Idukki trip
Kumarakom and Alleppey trip
Trivandrum enter Nagercoil and proceed towards Kanyakumari Tirunelveli trip
Ooty Coimbatore and Tirupur trip
Kodai Madurai Tiruchirappalli trip
Dhanushkodi Rameshwaram Chidambaram karaikudi pollachi Kanyakumari trip
Vizag Araku valley lambasinghi trip
Hyderabad Secunderabad trip
Chittoor Nellore warangal trip or Kakinada Vijaywada club trips Coorg Madikeri mangalore trip
Mangalore Udupi Sringeri trip
Bangalore Mysore Chikmagalur trip
Only hampi or hampi plus Madikeri plus kudremukh trip. If you want to cover all four south states Starting with Bangalore you could proceed towards Mysore then enter Wayanad then Munnar from there enter Ooty then proceed towards Coimbatore then move to karaikudi and enter Vizag visit Araku and move towards Hyderabad and return. Pondicherry is yet another dream travel spot besides Gokarna Idukki vagamon pollachi. If you are planning temple trips you can start with hampi, Udupi, Trivandrum, Idukki, Mysore, Madurai, Tirunelveli, Kumbakonam, Rameshwaram, Tirupathi, Vijaywada and Nellore. Paniyeli poru, Horsley hills, Coonoor, Kotagiri, Yelagiri, Nelliampathy are some offbeat places of south India.
You can cover each state of South one at a time Like starting from Orissa, to Kanyakumari you need a lot of time,so depends on how long are you planning to travel for,accordingly choose state and explore,you can start from Kerala also but explore with time in hand then only you can enjoy actual trip.if you start from Banglore you can go for Mysore & Coorg.Kerala side you can go towards Munnar.
Tamil Nadu you can go towards Connor,ooty,
Kanyakumari is a must visit
Hello, Karnataka - Kudremukh, Bamikonda falls, Coorg, Mysore, Udupi, Mangalore beaches, Belur, Halebidu, Sringeri much more TN - Dhanushkodi, Rameshwaram, Kanyakumari, Great chola temples, Chennai beach and museum, Isha foundation, Yercaurd, Yelagiri hill station etc. AP - Vishakapatnam, Hyderabad, Golconda fort, Horsley hills etc Kerala - Munnar, Varkala, Conoor etc Check out my profile, mostly South Indian trip blogs. Happy Travel :)