From Gizmodo
Ice Age Artists Left 280 Engravings in This Spanish Cave. Visitors Walked Right Past Them
To be fair, the cave was really dark, and there was a good amount of tourist graffiti.
TechStar AsiaIdeas without bordersAsia & global innovationTechStar AsiaIdeas without bordersAsia & global innovationFrom Gizmodo
To be fair, the cave was really dark, and there was a good amount of tourist graffiti.