Australia's arid outback covers 70% of the continent's terrain, but along the eastern coast is a whole other world of soaring peaks, towering cliffs, and lush forests: the Great Dividing Range. These mountains tell the story of how this ancient land came to be and how its unique species have evolved and adapted to survive. Shot from majestic heights and deep within its diverse worlds, we explore the range that both unites and divides Australia, and the Tasmanian devils, koalas, southern corroboree frogs, and other creatures who call it home.