Imagine hacking through a wild jungle and finding a perfectly paved geometric tile floor stretching into the wilderness. That same cognitive dissonance strikes anyone standing on Northern Ireland's coast before 40,000 interlocking hexagonal stone columns marching into the sea.

This episode explores how the Giant's Causeway forced humanity to bridge ancient folklore, world-changing fine art, and the literal birth of modern geology, all while the site stubbornly keeps revealing new secrets.

• The legend of Fionn mac Cumhaill, the giant Benandonner, and the clever wife who disguised her husband as a baby
• How Irish gods shrank into fairies while mortal heroes grew into giants, per an 1888 folklore collection
• The real volcanic origin 50 to 60 million years ago, with contracting lava fracturing into hexagons and ball-and- ...