What is the fine-grained topic of the following text: RRegarded as the heart of the tourist route known as "Frontier Country" Grahamstown, along with towns like Alicedale, Sidbury, Riebeeck East, Hogsback and Alice, is part of one of the most diverse ecological regions in South Africa, with thousands of hectares devoted to nature and game conservation, and a history steeped in forts, conflict and strife. Only return the topic.
Tourist route "Frontier Country" and its ecological diversity in South Africa