Tow Hill is the remnents of an ancient volcano that erupted at the edge of the sea, was cooled by the sea and then eroded by the sea and glacial action. What is left on the north side is the basalt columns of the core of the volcano. It is 300' above sealevel which isn't that high but when it is the only bump on the landscape it seems high.
The view from the top is amazing and today as I head for home the sea and the sky and the sun were working at being one. I love the look of mercury!