Ranikot Fort is a historical fort located in the Jamshoro District of the Sindh province in Pakistan. It is believed to be the largest fort in the world with a circumference of around 26 km, and it is also known as the "Great Wall of Sindh". The exact date of its construction is unknown, but it is believed to have been built during the 17th century, with additions and renovations made during the 18th and 19th centuries.

The fort has a number of gates, bastions, watchtowers, and other defensive structures, and it was built using a combination of local limestone and sandstone. It was designed to provide protection to the Baloch and Brahui tribes of the region against the forces of the Mughal Empire, and later against the British.

The fort has been designated as a national heritage site by the Pakistani government, and it attracts a large number of visitors every year. It is also a popular location for photographers, filmmakers, and other artists, who are drawn to its stunning architecture and scenic surroundings.