Where were runes found?

Could you please enlighten me on the origins of runes? Could you tell me where they were initially discovered? I'm fascinated by their historical significance and would love to know more about the locations where they were unearthed. Did they originate in a specific region or culture? If so, which ones? I'm particularly interested in understanding the geographical distribution of rune inscriptions and how they might have influenced various civilizations. Could you provide some insight into this?