At the base of Mt Hay, on what was once a rumbling volcano, are the fruits of its violent eruptions known as "Volcanic Birthstones" or "Thunder Eggs". Ordinary on the outside, these 120 million-year-old geo treasures are stunning underneath and their layers tell the story of an incredible geo journey. Heading west, see the breathtaking sandstone plateau rising above the plains at Blackdown Tableland National Park. The walks there and the views are stunning.