Rising Sea Levels Threaten Northern Ireland's 'Giant's Causeway' (Picture)

At the foot of Antrim Mountain in Northern Ireland, there are more than 40,000 basalt stone pillars that look alike. They are different in size and height, extending from the foot of the mountain into the sea, just like a natural staircase leading to the depth of the sea. This staircase has a proper name: the Giant's Causeway, which is a famous tourist attraction in Northern Ireland.