Ngagu is a village on the Zanzibar

Zanzibar

Zanzibar ,Persian: زنگبار, from suffix bār: "coast" and Zangi: "bruin" ; is a semi-autonomous part of Tanzania, in East Africa. It comprises the Zanzibar Archipelago in the Indian Ocean, off the coast of the mainland, and consists of numerous small islands and two large ones: Unguja , and Pemba...

i island of Pemba. It is located at the end of a narrow peninsula known as Ras Mkumbuu

Ras Mkumbuu

Ras Mkumbuu is a long narrow peninsula on the central west coast of Pemba Island, one of the two main islands of Tanzania's Zanzibar Archipelago. The town of Chake-Chake, one of the island's main population centres, is located immediately to the south of it on Chake-Chake Bay...

, which lies on the west coast immediately to the north of Chake-Chake Bay

Chake-Chake Bay

Chake-Chake Bay is a large indentation in the central west coast of Pemba Island, one of the two main islands of Tanzania's Zanzibar Archipelago.The town of Chake-Chake, one of the island's main population centres, is located in the central coast of the bay....

. The town is located close to the Quanbalu Ruins. Possibly dating from as early as the eighth century, these are the remains of a major trading centre which may have been Africa's oldest Muslim town.