Canada lowered a retired Boeing 737 onto the seabed off Vancouver Island; now it serves as an artificial reef for marine life
https://timesofindia.indiatimes.com/world/rest-of-world/canada-lowered-a-retired-boeing-737-onto-the-seabed-off-vancouver-island-the-100-foot-jet-now-sits-nearly-90-feet-underwater-as-an-artificial-reef-for-marine-life/articleshow/133422469.cms
