I thought I would create a blog to host this rather than impose on Lost Geologist. I invoke the Schott Rule (former winners have to wait until posting for 1 hour for each WoGE they got right) but things seem rather slow at the moment, perhaps you are all in the field.
As a hint, the islands in the image are in salt water, so that is only 356,000km of coastline to check ;->
The rules of Where on Google Earth are that to win you post in a comment the location of the image, together with some information on its geological interest. The prize is the right to produce the next one.