The Giant's Causeway
is a area of 40,000 basalt
columns resulting from a volcanic
eruption 60 million years ago. It is a World Heritage Site
and is located on the North Antrim Coast
of Northern Ireland
While recent scientific research1 suggests the columns were formed as a natural consequence of lava cooling, legend has it that the giant Finn MacCumhaill (Finn McCool) built the causeway to walk to Scotland without having to get his feet wet.
1 Jagla, E. A., Rojo, A. G. Sequential fragmentation: the origin of columnar quasihexagonal patterns. Physical Review E, 65, 026203, (2002)