Our ancient ancestors have done some interesting things to human bones over the years, but one example from the Iron Age Iberian Peninsula is a real puzzle.

He said: 'It felt serene and peaceful, it's very atmospheric and very well kept, a real hidden gem. 'There is no doubt looking at a wall of human skulls is not your everyday experience but this ...

Our ancient ancestors have done some interesting things to human bones over the years, but one example from the Iron Age ...