It is situated along Northern Ireland’s northern coast between Londonderry and Belfast in County Antrim, and forms part of what is considered by many to be one of the most interesting coastal drives in the world. You pass through lovely coastal villages, lots of greenery, including some great golf courses,
http://en.wikipedia.org/wiki/Giant%27s_Causeway but below are some photos which hopefully show how the rocks mutate from fairly ordinary rocks to very extraordinary rock formations.
One final comment. There is a new visitor centre. It is a very striking and impressive modern structure but strikes me as a waste of money. The interior displays were quite poor and the merchandise was very poorly conceived (I mean, why don't the T-shirts include designs related to the Causeway?. The organizers should spend some time over at the Titanic Museum shop (see later post) to learn something about merchandise design and marketing. But notwithstanding this, go and visit the Causeway.