Final answer:
Traders from Kilwa could reach the cities of Sofala and Great Zimbabwe by land, key centers in the gold and luxury goods trade.
Step-by-step explanation:
Two other cities that traders could reach by land routes from Kilwa were Sofala and Great Zimbabwe. Sofala was an important trading outpost and the southernmost point of settlement at the time, playing a crucial role in the gold trade. Great Zimbabwe was another pivotal trading center, situated at the head of the Sabi River valley and connected to Sofala, which linked Zimbabwean trade goods to Kilwa.
Traders from Kilwa could access the interior's wealth by utilizing trade routes to these cities, thus bypassing intermediaries to enhance their trading enterprises. The extensive network of Swahili merchants included luxury goods like Chinese Ming porcelain and carved faience from Persia, creating a prosperous trade system throughout the region.