It's not a stupid question, but ice is remarkably durable and has 'self healing properties', to describe ice-cubes sticking together in the most pretentious way

It's not a stupid question, but ice is remarkably durable and has 'self healing properties', to describe ice-cubes sticking together in the most pretentious way possible. There have been projects to make battleships out of ice. https://en.wikipedia.org/wiki/Project_Habakkuk https://en.wikipedia.org/wiki/Project_Habakkuk Bonus answer: melting it with a flamethrower would be incredibly expensive because of enthalpy. https://en.wikipedia.org/wiki/Enthalpy https://en.wikipedia.org/wiki/Enthalpy