The best place to visit in winter.Me and my friends started from vizag.To see the Aaraku valley beauty most people prefer train to reach there, because there are so many caves while travelling in train you can see and enjoy.we reached there at11: 00 a.m and we hired a taxi to katika waterfalls.People who love trekking will enjoy it.The water was so cold and after some we went to borra caves, famous for stalagmites.It was very dark and crowdy, so many people came to see that naturally formed caves.Tourism department installed electric lamps that made more beautiful to see inside.After we went to chaparai and Tribal museum.My suggestion before going to Araku better to book room in hotel/resort otherwise it is very difficult to find a room.