BORRA CAVES
Borra Caves are located at a distance of 92 Km north of Visakhapatnam. The caves open with 100 meter on horizontal plane and aobut 75 meters on vertical plane. These caves spread over an area of one square KM and the origin of river Gosthani which flows through the district. This you must see if you are in Araku Valley or in Visakhaptanam. This location is at a height of 800 to 1300 meters from MSL. William King the British geologist discovered this million years old cave in the year 1807.
Breath taking hilly terrain, beautiful landscape, semi-evergreen moist deciduous forests, and wild fauna of the area are a visual feast.
The humic acid in the water reacts with calcium carbonate in the limestone and dissolves the minerals breaking the rock gradually. The perennial water flow over a period of time results in the formation of caves. Stalagmites are formed due water percolating from the roof containing calcium bi carbonate and other minerals from mounds. Same way stalactites are also formed and because of their different shapes tourist and locals have given different names to them. One can see different formations of the stalactites and stalagmites as Shiv-Paravathi, Mother-Child, Rushi's Beard, Human Brain, Crocodile, Tiger and Cows udder.
On your journey to Araku by train you can see picturesque Landscape with greenery, peaks and valleys. Before reaching Borra Guhalu Railway station the train passes through 42 tunnels.