Rare 2,100-year-old gold coin bears name of obscure ruler from pre-Roman Britain
One thing I always wonder is how did all these countries manage to find enough gold to run an (albeit tiny) economy off them?  I've never heard of/seen a gold mine in the UK, and yet 2000 years ago they were mining enough to mint currency.  Was it all relatively surface level and rapidly mined out,  and now all gone?