When we talk of Mangrove forests in India, it is Sundarbans which comes to our mind immediately. But there is one such forest in Tamil Nadu - Pichavaram, Chidambaram. It can be reached from Chennai in about 4.5 hours. If you are travelling nearby Chidambaram or Kadalur, I would suggest adding Pichavaram to your plan. Otherwise, spending a whole day exclusively for it may be too much of a travel.
