You can visit Ooty if you wish to plan for 3-4 days.
Coonoor is also near Ooty where one can have a breathtaking view of Tea Gardens.
Flavoured tea and home-made chocolates remain on the shopping list of visitors and really they are worth it.
Hi Dinesh, I would suggest you to visit Ooty, Hill station. If you're interested in hiking, go ahead visiting Kotagiri hill and Nilgiris. You can experience site seeing as well as hiking and falls. Its a two day trip which will be worth it. If you would like to know more about the places I mentioned please follow my blog on Tripto " Queen of hill stations" - Hope I answered your question!