From Our Secret Harbour, we continued on West to Radstock Bay and Caswell’s Tower. The run started early and We were there by Lunch time. Caswell’s Tower is as you can see a Gibraltar type block of rock.. At the Top there is a hut where you can see for miles around. This spot was used for decades to count and watch Polar bears, in relative safety. We did not go up there as the path way has sheared off the top about 150m from the Plateau. We did Tender run in our Zodiac Milpro with the crew and guests looking for Walrus and Polar Bears.