Imagine walking up one of Britain's highest mountains and finding… a piano! That's exactly what happened on Ben Nevis in Scotland. In 2006, volunteers cleaning up rubbish near the top of the mountain discovered an old piano. It was incredibly heavy, so everyone wondered the same thing: How did it get there? Nobody seemed to know. The piano was missing its keyboard, but its strings and frame were still there. People started looking for clues. Even an old biscuit wrapper helped to give them a possible date for when the piano had been taken up the mountain. It turned out that people had carried it there as part of a stunt many years earlier. But just imagine reaching the top of a mountain and finding a piano waiting for you!