At Weymouth on the South Harbour is Nothe Fort. In history the south coast was strategically import to ensure that England wasn't invaded by the French, so there are quite a few fortifications built along the coastline. This was a fascinating place also with not only canons and guns, but also World War II memorabilia and also contained a Cold War bunker.
After lunch we drove down to Portland and visited Portland Castle, this time another fortified castle built during the reign of Henry VIII (he didn't want the Spanish to invade either). I took some photos from the upper gun deck.