Giant's Causeway

Monday, December 8, 2008

Though it certainly looks chiseled and hewn, this incredible rock bridge is completely natural - 40,000 interlocking basalt columns which are mostly hexagonal. These basalt rocks were formed when molten lava was pushed through cracked chalk beds. As the lava cooled, the liquid basalt contracted into distinctive shapes.

Images via Reformation Tours, Aberfeldy, Travels in Ireland and Letter to America