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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.
Lord Howe Island by Julian Pencilliah, via Flickr. Also known as "Ball's Pyramid" is the worlds highest seastack. Its what's left of an old volcano that emerged from the sea about 7 million years ago. Its sits off Australia in the South Pacific.
Rock formation in ocean
Ball's Pyramid. It is 562 metres (1,844 ft) high, while measuring only 1,100 metres (3,600 ft) in length and 300 metres (980 ft) across, making it the tallest volcanic stack in the world. Ball's Pyramid is part of the Lord Howe Island Marine Park. Photographer: S D Miller/Nature Focus. Rights: Australian Museum.