Microwave ovens are often discarded because they are old and don’t match the look of your other kitchen appliances anymore. Have no fear, there is a good use for these ovens. You can use the MOT (Microwave Oven Transformer) found inside for some high voltage fun or simply make a pressure vessel bomb out of it. Tesla500 on Youtube has been having fun with these for years. Have a look at the above and below videos for an example of some of the antics he is up to. Make sure you subscribe to his channel if you like teardowns and some crazy high voltage fun.