Andaman & Nicobar Islands
Things to do at Andaman & Nicobar Islands inclue:

• Snorkelling
• Scuba Diving
• Heritage Sight seeing
• Sunbathing
• Sea bathing
• Trekking
• Meeting indigenuous tribes with special permit

Andhra Pradesh
The activities not to be missed while in Andhra Pradesh:

• Heritage sight seeing
• Enjoying a Kuchipudi performance
• Riding down the rivers in a circular boat
• Enjoying a Hyderabadi biriyani
• Buying Pearls & Lac jewellery
• Visiting the handicraft emporium
• In late summer, try Baigampalli mangoes

Goa
While in Goa, try these out :

• Sunbathing
• Scuba dicing
• Snorkelling
• Para sailing
• Shopping at Mapusa Friday market
• A drink of Feni - a local drink made of cashews
• Trekking in the Ghats
• Visiting Heritage Churches of Old Goa
• If  before Lent, the Goan carnival
• Exotic sea food
• Night dancing on the beaches

Karnataka
Karnataka promises some exciting activities. Try these out.

• Trekking in western Ghats
• Heritage sight seeing
• Rock climbing near Bangalore
• Jungle safari in Bandipur National Park
• Pub hopping at Bangalore
• Visiting some ancoient caves
• Visiting  Gomateshwara and other pilgrim centres
• Trying the unique breakfast called Pongal

Kerala
Kerala is for the luxury seeker. Sothe you body, mind and soul with good sights, exotic food, rejuvenating massages and Yoga. Some must do activities are:

• Exploring Kerala on a House boat
• Ayurvedic treatment or wellness massages
• Yoga classes
• A drink of Toddy - a local drink
• A vegetarian meal called Sadya
• Superior seafood
• Kozhikodan Halwa for the sweet toothed
• A day with the masters at Cheruthuruthy for art lovers
• A ride on the elephant
• A visit to a local temple festival
• Viewing a Kathakali performance
• Seeing the martial art of Kalaripayattu
• If around Onam festival, seeing a snake boat race 

 Lakshadweep Islands
These small islands promise a lot for the tourist. some interesting activities are

• Scuba Diving
• Snorkelling
• Local culture
• Sunbathing
• Sea bathing

Tamil Nadu
Be sure to check some of these while touring Tamil Nadu:

• Visit Nattokottai mansions in Chettinadu
• Visit the temple festivals
• Enjoy a carnatic music recital
• Take the narrow gauge heritage train from Conoor to Ooty
• Try a south Indian meal
• Try Idly sambar for breakfast
• Visit the coffee plantations