This magnificent and well-designed fort is symbol of best architecture a by gone era. It is reputed to be the largest unexplored fort in the world. Its walls are about 26 km or 16 miles in circumference. The walls of fort are made of gypsum and lime cut sandstone. Some walls are of crest stones Different types of bricks are used to build the wall which indicates its construction in different period of time. Its huge undulating walls weave and immerse over the hills are built with dressed sandstone and reinforced with 45 bastions along the outer wall, of which 7 are rectangular and the remaining are round. Its wall is divided into two parts. First portion is 8.25 km long wall, which is man-made, built with yellow sandstone and 30 ft high. While other 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. A mountainous ridge, Karo Takkar (Black Hill), running north to south, forms its western boundary and the 'Lundi Hills' forms its eastern boundary.
The majestic fort is visible at glance from the distance. Some of the walls bear a resemblance to the Great Wall of China as they weave through the hills. Therefore the fort’s wall is also called “The Great Wall of Sindh” and “Deware Sindh by locals.
Within Ranikot, there are two more fortresses; Meeri and Shergarh, each have five bastions. Meeri is small fortress. Meerikot have entrances, curved and angulated with a safe tortuous path. From the military point of view, Meerikot is located at a very safe and central place in the very heart of the Ranikot with residential arrangements including a water-well. The second fort looks like a giant eagle’s nest called Shergarh fort (house of lion) is roughly 15km. It can be seen from Meerikot. Shergarh is built with whitish stone, it too has five bastions. Though its location at 1480 feet above the sea level makes this fortress a unique structure, it also makes it equally hard for available of water, which can only be had from the brooks and rain streams, hundreds of feet below. The steep climb up to Shergarh gives a commanding view down over the whole fort and its entrance and exit points. On a clear day one can even see Indus , 37 kilometers away to the east.
A rain stream named “Mohan Nai” enters the fort from its rarely utilized western 'Mohan Gate'. It runs through it, fall downs 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 floods about 33 kilometers more to enter the Indus River .A spring coming out from underground near the Mohan Gate is named as 'Parryen jo Tarr' Another spring is Waggun jo Tarr or "the Crocodile Spring", named so as crocodiles were resided there.
The terrain inside the fort is plentiful with greenery, hills, valleys, streams, ditches, ponds, collections, fossils, building structure, bastions, watchtowers, ammunition depots, fortresses. The streams are abundant in tropical fish. Every structure in the Ranikot has its own uniqueness and beauty. Some of the area of the fort has been cultivated. Scattered animal skeletons and prehistoric fossils can be found on the top of Lundi Hills.
The original aims and causes to build this marvel fort are unknown. There is no trace of any old city inside the fort and the present construction has little evidence of prehistoric origins. The present structure was reconstructed on the site of a much older fort by Mir Karam Ali Khan Talpur and his brother Mir Murad Ali in in the early 19th century, probably for the purpose to protect the trade route from Thatta through the Khirthar hills to Central Asia .
Beside the Mohan Gate and the Sann Gate, there are two more gates, rather counterfeit gates. One is towards the side of ancient town of
One of the three graveyards has about four hundred graves made of Chowkundi like sandstone with engraved motifs of sunflowers and peacocks. Another one appears to be a graveyard of Arabs. The third one had sixteen or seventeen graves earlier but now there are only four graves. The local inhabitants call it the Roman's graveyard.
Ranifort stand in uninhabited terrain of the Kirthar range It is an international tourist site and been on the list of tentative UNESCO World Heritage Sites since 1993. The best way to reach this spectacle site of ancient times is by either jeep or camel. The camel is easily available from Sann Town .