Celts were slightly
obsessed with sacred groves of trees: tree spirits (Dryads) were said
to live there, and very often a well or magical cup would
be included in legends about these places.|
Celtic priests did not usually build temples, preferring to worship their gods amongst the natural landscape.
Nemetona - the goddess of sacred groves, was also the Celtic guardian goddess of stone circles.
The Roman historian Tacitus claimed that the Sacred Groves of Anglesey were used by the Druids to perform human sacrifices, and parts of this island still have a very unsettling atmosphere even on a bright summer day.