If you want to visit Araku valley, you must ride the Kirandul passenger from Vizag. It starts at 7:05 am everyday from Vizag and reaches Araku at 11:05 am. You can also drop at Borra cave station (10.02am). It would be better if you reserve seats at prior. The 3 hour journey consists of 58 tunnels, many bridges connecting the hills, mesmerizing scenery, emerald green eastern ghats and many sparkling waterfalls that amazed me with their beauty. I could not wink for some hours while travelling in the amazing ride maintained by Indian Railway. One can also ride this train to reach Jagdalpur, where the Chitrakot waterfalls resides.