Ben Bulben

Whenever I see an isolated hill or a mesa, my first thought is that thousands of generations of humans must have worked their way to the top either for the view or to spot game.

This is the north face of Ben Bulben, in Ireland (apparently access from the south is much easier).  I should think the first modern humans to reach the summit must have found artifacts dating back for millennia.

Via Titam et le Sirop d'Erable.