Futagoiwa Geopark is a place that you must check out for yourself otherwise you may be disappointed . This unique rock, called Futagoiwa in Japanese (Twin Rock in English) was made by mudflow sediment from many hundreds and thousands of years ago. Over the years the Twin Rock has been eroded by waves. It contains large quantities of Andesite from volcanic activity on the Kunisaki Peninsula 1.5 million years ago and although there were other similar rock towers once, they have been broken by sea erosion and the passage of time and slowly diminished bit by bit.
However, Futagoiwa Geopark still today stands proudly on the west side of the Tachibana Bay between Unzen and Minamishimabara Cities and is a great example of geology explaining the history of the area from many years ago. A huge plus for anyone who has an interest in geology or just a nature lover who needs their regular nature fix!The last 2 rocks standing
The main rock