City Wall and Moat, Benin City
These are the most impressive city walls and moats in southern Nigeria. At their highest point, the walls were nine metros high and the moat (ditch) nine metros deep, making a total incline of 18 metros. Unfortunately in the past few years, the walls and moats has been the victim of extensive soil excavation used as a source of building materials.

City Wall, Zaria
The Zaria City wall perhaps remains the best preserved among the cities of northern Nigeria. The need for defensive walls has disappeared since the occupation by the British of the Western Sudan at the beginning of this century. Moreover, the rains of over 50 wet seasons have battered down the tall mud walls rampant in this part of the country. The walls of Zaria, which circumnavigate the city, are between 14 and 16 kilometers long and are pierced by eight gates.

Gobirau Minaret, Katsina
This imposing minaret, or tower which originally is said to be some 120 metros tall and which was built of mud and palm timbers, is all that remains of the mosque constructed in Habe times, before the holy wars of Sheik Unman Dan Fodio. Parts of the 15.25-meter tower are thought to be about 250 years old.

Chief Ogiamen's House, Benin City
This building is protected under the Antiquities Act of 1953 principally because of its architectural eminence as a fine example of Benin traditional architecture. It has an elaborate system of court yards and altars. It is a chief's house and was probably built before the 1897 British expedition against Benin. The big fire that gutted the city following the British invasion did not affect the building.

Foot Bridge, Kaduna
This is an interesting example of indigenous engineering before the advent of roads and railways in Nigeria. The bridge was originally erected by Lord Lugard at Zungeru in 1904 and re-erected in 1954 in the Kaduna Gardens.