Portugal, Pinhel, Parque Arqueologico do Vale do Coa. A UNESCO employee shows a group an engraving which is part of one of the greatest archeological discoveries of Palaeolithic Art in recent memory, in the Parque Arqueologico. The oldest dates back 22000 years. The engravings themselves are similar to those found across Europe but their uniqueness lies in the fact that they are found outside on exposed rock faces and near water. The area is now a UNESCO world heritage site.