Miracles of Nature - S02:E08 - Naturally Harmonious

Zambia, the Latvian region of Kurzeme, the Georgian provinces of Kakheti and Svaneti, seem to have very little in common. They lie in Africa, Europe and on the borderline between Europe and Asia respectively. Kakheti and Svaneti are both a part of Georgia but very unlike one another. So where is the connection? How are these regions similar?