Final answer:
Historical sites in East Africa include the trading city-states such as Kilwa, the archaeological site of Olduvai Gorge, and the ancient stone structures of Great Zimbabwe.
Step-by-step explanation:
Some of the significant East Africa Sites from a historical standpoint include the early city-states along the East African coast, such as Kilwa, which was described in depth by the traveler Ibn Battuta. These city-states were important trading depots established by Arab traders and the local Swahili culture that developed was a mixture of Arab, African, and Indonesian influences. Another noteworthy site is Olduvai Gorge, important for its archaeological significance in understanding human evolution. Additionally, the stone structures of Great Zimbabwe represent the most famous ancient ruins in southern Africa, reflecting complex societies and serving varied purposes, including ritualistic, burial, or royal functions.