Where was the excalibur thrown when king Arthur died?

excalibur was not thrown in the lake with the lady nor was it drawn there by King Arthur. it was made in a mysic forge, the same place where lady guinevere betrayed arthur with lancelot. and, that is where it was thrown, back to where it came but if it needed to be drawn again it can be drawn anywhere, like the stone begonoth or anywhere. you just need to have a heart full of love and courage.and, you need to believe.