Finally saw it in person. My childhood dream come true. The more you look at it, the more interesting it becomes and the longer you want to look at it.
"Exposed at low tide, the feature comprises some one thousand pentagonal and hexagonal rocks, each 1 to 1.5 metres in diameter, stretching fifty metres from north to south over a length of two hundred and fifty metres. It was formed during the Miocene by the columnar jointing of andesitic lava as it cools and contracts."