AUSTRALIA // Far from the opera houses and flat-white coffees of the coastal cities, Victoria's remote Wimmera-Mallee region stretches vast and dry, dotted with towns with names like Brim and Sheep Hills. Why trek out here? To see Australia's largest outdoor art gallery, of course. In recent years, this agricultural country's tall metal grain silos have been transformed by prominent artists into enormous murals showcasing local community members, much to the rapture of art fans worldwide. Drive the 200km (125-mile) trail from silo to silo, taking in portraits of Aboriginal residents, local farmers, student athletes and kelpie sheepdogs, all dozens of metres high. It's a brilliant blending of art and history, past and present, the practical and the whimsical.