Carrickfergus Castle, one of the first and one of the largest of Irish castles, is still in good shape. It was built atop a rock ledge in 1180 by John de Courcy, provincial Ulster's first Anglo-Norman invader. Apart from being captured briefly by the French in 1760, the castle stood as a bastion of British rule right up until 1928, at which time it still functioned as an English garrison. Walk through the castle's 13th-century gatehouse into the Outer Ward. Continue into the Inner Ward, the heart of the fortress, where the five-story keep stands, a massive, sturdy building with walls almost 8 feet thick. If you're here at the end of July, you can enjoy the annual Lughnasa festival, a lively medieval-costume entertainment.
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