Ireland, County Carlow, Browneshill Dolmen which is a megalithic portal tomb with a capstone estimated at weighing 150 metric tons and dating from 4000 to 3000 BC.

Ireland, County Carlow, Brownshill Dolmen.

Namibia, Twfelfontein bushmen carvings are one of the most important archeological sites in Southern Africa. The site has an extensive collection of pre-historic rock engravings, or pectoglifs, some d...