The Giant 's Causeway ( known as Clochán an Aifir or Clochán na bhFomhórach in Irish and tha Giant 's Causey in Ulster-Scots ) is an area of about 40,000 interlocking basalt columns , the result of an ancient volcanic eruption .
The Giant 's Causeway is an area of about 40,000 interlocking basalt columns , the result of an ancient volcanic eruption .