“The mystery of Cape Town’s disappearing gun”

The story of a British military gun from the Victorian era that was designed to immediately disappear when fired (this allowed the crew manning the gun to reload it in relative safety).

The gun eventually disappeared in a somewhat broader sense of the term after it was buried and forgotten when the land that it was on was redeveloped in the 1920s. It was recently rediscovered during yet another redevelopment project.

http://www.bbc.com/travel/gallery/20190423-the-mystery-of-cape-towns-disappearing-gun