These stepping stones are naturally formed from the ocean's action and the salt on the rocks, dissolving in patterns to resemble a man-made sea-shelf.
Part of the entry-fee is a short cruise on the bay. It goes by the "Isle of the Dead", which is 2 acres and has 1200 people buried there, and the "Boys Prison". They sentenced children to "Transportation" as well as adults. Those over 8 years old could be hanged as well!
This is one of the views would-be escapees had. Nothing I'd want to try and swim!
The "Separate Prison" ensured inmates didn't talk to each other. They wore caps with facial covers, walked in chained groups of about 8, and went to church standing up, unable to see anyone but the preacher in the church.