GIANT S CAUSEWAY AND CAUSEWAY COAST UK AND NORTHERN IRELAND

Made up of 40000 black basalt columns jutting from the sea on Northern Ireland s Antrim plateau the Giant s Causeway has been as much encapsulated in local legends as it has been studied by geologists. Formed through volcanic activity during the Tertiary period 50 60 million years ago it was declared as World Heritage Site in 1986.