Castros de Santa Tecla. Galicia. The settlers of Monte de Santa Tecla established the hill fort culture, of which there are still important remains. It was discovered in 1913, when a road was opened. Circular buildings predominate, although there are also oval and square ones, the latter under Roman influence.
Arthur's Stone, sometimes known as King Arthur's Stone or Maen Ceti, is a Neolithic burial tomb dating back to 2500 B.C. and was one of the first sites to be protected under the Ancient Monuments Act of 1882. The famous Egyptologist, Sir Gardiner Wilkinson, was first to excavate the tomb in 1870 and claimed that the pathway followed by the ghostly apparition seen by many of King Arthur on a white steed, is the remains of a stone avenue.