The town of Nizwa was for a while the capital of Oman and has always been a centre of Islamic learning. The fort is its most prominent structure, completely overshadowing the town. The vast central tower is packed with stones and rubble and penetrated only with the odd room and staircase: as such it has proven virtually indestructible since its construction in the 17th century, a trait that was borne out when it survived an RAF bombing during a revolt in 1955. The fort is a fascinating and impressive structure to explore, and the views over the palm plantations and mountains from the ramparts are a major attraction as well.