It is located in the Kirthar Range, about 30 km southwest of Sann, in Jamshoro District, Sindh, Pakistan. It is approximately 90 km north of Hyderabad
It has an approximate diameter of 6 km. Its walls are on the average 6 meters high and are made of gypsum and lime cut sandstone and total circumference is about 20 km. While originally constructed for bow and arrow warfare it was later expanded to withstand firearms.
It is reputed to be the largest unexplored fort in the world. The purpose of its construction and the reason for the choice of its location are still unknown.
Ranikot is the most talismanic wonder of Sindh. Visible from five kilometers away its massive undulating walls twist and dip over the hills. With the circumference of about twenty kilometers, its walls, built with dressed sandstone and reinforced with 45 bastions along the outer wall, of which 7 are rectangular and the remaining are round. All modified through the ages to accommodate the use of gunpowder, this perhaps makes it the largest fort in the world.
The original purpose and architects of Ranikot Fort are unknown. Some archaeologists attribute it to Arabs, or possibly built by a Persian noble under the Abbasids by Imran Bin Musa Barmaki who was the Governor of Sindh in 836 CE. Others have suggested a much earlier period of construction attributing to at times the Sassanians Persians and at times to the Greeks. Despite the fact that a prehistoric site of Amri is nearby, there is no trace of any old city inside the fort and the present structure has little evidence of prehistoric origins.
Archaeologists point to 17th century CE as its time of first construction but now Sindh archaeologists agree that some of the present structure was reconstructed by Mir Karam Ali Khan Talpur and his brother Mir Murad Ali in 1812 CE at a cost of 1.2 million rupees (Sindh Gazetteer, 677).
Fort Ranikot is located in Lakki Mountains of the Kirthar range to the west of the mighty River Indus at a distance of about 30 kilometers from the present day town of Sann. A mountainous ridge, Karo Takkar(Black Hill), running north to south, forms its western boundary and the 'Lundi Hills' forms its eastern boundary. Mohan Nai, a rain-stream enters the fort from its rarely used western 'Mohan Gate', where it is guarded by a small fortification, changes its name to 'Reni' or 'Rani Nai' or rain-stream and gives the fort its name. Ranikot is thus the 'fort of a rain stream' - Rani. It runs through it, tumbles in a series of turquoise pools to irrigate fields and leaves the fort from its most used 'Sann Gate' on the eastern side. It then travels about 33 kilometers more to enter the Lion River - Indus.
Most of the twenty six kilometers long wall is made of natural cliffs and mountains which at places rise as high as two thousand feet above sea level! Only about 8.25 km portions of its wall are man-made, built with yellow sandstone. This was first measured on foot by Badar Abro along with local guide Sadiq Gabol. As one enters the fort, one can find hills, valleys, streams, ditches, ponds, pools, fossils, building structure, bastions, watchtowers, ammunition depots, fortresses - all inside Ranikot, adding more to its beauty and mystery. A spring emerging from an underground water source near the Mohan Gate is named as 'Parryen jo Tarr' (the spring of fairies).
Currently, only the Gabol Baloch tribe occupies the area within Ranikot. The area has become a virtual village for the Gabol's over the past century who earn their livelihood by offering tours to many of the visitors, as well as by small scale farming . Today, the Gabol tribe chief Nabil Gabol is trying to attract the Sindh government's funds to develop the area into an international tourist site
