If you’re a diver in British Columbia, there are a few surprises waiting for you in the murky depths of the Pacific.

Since 1991, the Artificial Reef Society of British Columbia has gutted, cleaned and sunk a Boeing 737, a Second World War Victory Ship, four destroyer escorts, a coastal freighter and now, as seen in Canadian Geographic’s January/February 2015 issue, a destroyer.

But the reefs aren’t only fun for divers. The not-for-profit volunteer run organization also ensures they create important habitats for West Coast sea creatures. 

According to the group’s president Howard Robins, they take great care to ensure each reef they create meets the federal government’s highest environmental standards. The Society also works closely with the Vancouver Aquarium, which relies on divers to provide information about which species they see while diving and where.

On the map below you can see where the artificial reefs are and plan your next West Coast diving adventure accordingly.