Hi
I hope it's not too late to reply
You can sight see:
1. Manakula Vinayagar temple/Cathderal Church on Mission Street/ French Church on Rue Suffren
2. Stroll down the beach in the evening. There is a nice promenade with a European touch to it
3. If you have kids, you can take them to the adjacent park, It was very well maintained
4. If you have ample time, walk down the White part of the town. You will lovely French villas and some houses sporting an amalgamation of Tamil and French architecture
5. There are plenty of good restaurants. You get lovely French, Bengali cuisines at affordable prices
6. You can go boating at Chunambar lake. This lake is featured in movies
7. Then, you can of course go the Aurobindo Ashram and Auroville
These are some of the places you should visit. Let me know if you need more info.