A historic lighthouse, built by the Sultan of Zanzibar and the British in 1904, provides spectacular views of the turquoise seas between Tanzania mainland and Zanzibar, still plied by dhows unchanged for a thousand years. There are 132 steps to the top, and since 1926 it has been powered by an AGA gas mechanism which was replaced by a solar system in 2013. The lighthouse falls under the jurisdiction of the Zanzibar Ports Corporation (ZPC) which ensures that it continues to function as an important and essential signal of shallow water to maritime users.