Nizwa Fort (قلعة نزوى) is one of the most popular tourist attractions in Oman due to the fact that it is an amazing example of old Omani architecture that provides an illustration of the way Omani people used to live in ancient times. The oldest part of Nizwa Fort was originally constructed by imam Al Sult bin Malik Al Kharusi in the ninth century and was later renovated by imam Sultan bin Saif Al Yarubi in the 17th century. Imam Sultan bin Saif Al Yarubi is known as the imam responsible for removing the Portuguese from Oman.
It was built in the 1650s by the second Ya’rubi Imam; Imam Sultan Bin Saif Al Ya'rubi, although its underlying structure goes back to the 12th century. It is Oman's most visited national monument. The fort was the administrative seat of authority for the presiding Imams and Walis in times of peace and conflict.The main bulk of the fort took about 12 years to complete and was built above an underground stream. The fort is a powerful reminder of the town's significance through turbulent periods in Oman's long history. It was a formidable stronghold against raiding forces that desired Nizwa's abundant natural wealth and its strategic location at the crossroads of vital routes.
Nizwa Fort is unique among other forts in Oman due to the cylindrical shape of its main tower which also happens to be the biggest to tower in a fort in Oman. Nizwa Fort has seven wells, a number of prisons, and prosecution ground. The main tower features many defence mechanisms Omanis used in the past such as pitfalls, honey traps, and gun shooting windows.
The fort also contains many exhibits and artefacts displayed in each of the rooms of the fort. There is also a nice gift shop and a permanent exhibition that illustrates the geographical history of Oman and many details about the history of Nizwa and how it used to be the capital of Oman at some point in time.