Hole in the Wall is a man-made hole that was drilled through the rock for an old pipeline. The pipeline has since been removed but you can see some of the remaining supports.
Location
There’s a few different ways to get here but I think the most common is off the highway just before entering Port Alberni. Do not drive through the gate if it’s opened as it may be closed later! I would recommend parking in the gravel lot and walking from there. It can be a little difficult to find so I would recommend using AllTrails if possible (https://www.alltrails.com/trail/canada/british-columbia/hole-in-the-wall-port-alberni). Round-trip, this hike is approximately 4.3km.