Coober Pedy | What makes it unique: This Australian city is completely underground and has been given the informal title of The Opal Capital of the world. Visit one of the many underground mines, just be careful not to tumble down any shafts!
Australia boasts a geoglyph that's larger than Peru's "Nazca Lines" and England's "White Horse". Called the "Marree Man", the pictograph measures 4.2 km tall by 2 km wide and is etched into a plateau near Marree. It depicts an Aboriginal warrior throwing a hunting stick and is so large that it can be viewed fully only from the air. "Marree Man" was discovered by a charter pilot in 1998 and, despite being the world's largest geoglyph, its origin remains a mystery. — with Debbie Borgono
Mungo Man, discovered in 1974, was an early human inhabitant of the continent of Australia, who is believed to have lived between 68,000 and 40,000 years ago, during the Pleistocene epoch. The remains are the oldest anatomically modern human remains found in Australia to date.