Kozarnika (Bulgarian: Козарника, "the goat shed") is a cave in northwestern Bulgaria that was used as a hunters’ shelter as early as the Lower Paleolithic (1,6 million BP). It marks an older route of early humans’ from Africa to Europe via the Balkans, prior to the currently suggested route across Gibraltar, and probably keeps the earliest evidence of human symbolic behaviour ever found. Here have been found the earliest European Gravette flint assemblages.