Day eight of my short Vancouver Island vacation. North of Campbell River in the Seymour Narrows there used to be an underwater mountain with two peaks. This was called Ripple Rock. Due to the hazards this caused to navigation and the many boats that were sunk in the area, the Government of Canada fixed the problem. In 1958 in what was at the time the largest non-nuclear peacetime explosion ever recorded the tops of the underwater mountain were exploded. It was the first ever live coast-to-coast broadcast on CBC.
The hike itself is very pretty, mainly walking through old growth forests with frequent viewpoints. As the final viewpoint of Ripple Rock you can see whirlpools as the tide swirls around the remnants of Ripple Rock. The current is so extreme that many smaller boats struggle to get through and need to stay to the far edges of the narrows.