This is the Wave Rock (Rock Ola) in Australia. Believed to be one of the oldest rocks on Earth, with million years. Its distinctive shape is caused by erosion of 60 million years. Photo: Getty Images rocks-minerals-gems-and-geology
Ball Pyramid - the world’s tallest sea stack. It is the remains of a shield volcano formed about 7 million years ago, located southeast of Lord Howe Island in the Pacific Ocean. Ball's Pyramid is part of the Lord Howe Island Marine Park in Australia.