Radiocarbon dating of the ‘Spanish Stonehenge’ found the stones range in age from around 4,000 to 5,000 years old and this ties them curiously to the history of Stonehenge. The first monolith structure in Europe was found in Brittany dating back as far as 4,794 BC and other early monuments (red) were found in northwest France, the Channel Islands, Catalonia, southwestern France, Corsica, and Sardinia from a similar time period.