Ripple Rock is an underwater mountain located in the narrows between Vancouver Island and Quadra Island. For decades, it posed a marine hazard until it was partially destroyed in 1958 during one of the largest non-nuclear planned explosions in history (!!)

Though there is a Ripple Rock lookout directly off the highway, the best views can be found along the Ripple Rock Trail. This 4km trail offers several scenic ocean viewpoints on the way to the final lookout, which overlooks the site of the explosion.