The Esquimalt Graving Dock at Skinner's Cove opened July 1, 1927.  At 360 metres (1,200 feet), it's the largest on the west coast of the Americas and can accommodate 90% of the world's ships.
For information about escorted tours of this amazing facility, call Public Works Canada at (250) 363.3914. (Enquiries are welcome; tour availabilities may at times be restricted for reasons of safety and security).