Where was Ramses II found?

Could you please elaborate on the location where Ramses II was discovered? Was it in a royal tomb or a hidden chamber? Did archaeologists stumble upon the find by chance, or was it the result of a targeted excavation? How did they know where to look for the great pharaoh's final resting place? And lastly, how does the discovery of Ramses II's burial site contribute to our understanding of ancient Egyptian history and culture?