While Ireland tries to attract American tourists, a café is waging war against the Yanks. In the window of Peter's Place Cafe in Waterville, County Kerry is a sign with iffy spelling: "No Bus/Coach or Loud American's." Calls and an email seeking comment were not returned, but locals said Monday those views are not shared by the community. The Waterville Business Association is planning to "celebrate their unique Waterville-American relationship," Radio Kerry reported. In fact, the first transatlantic telegraph cables from the United States reached Europe in 1866 at Waterville. The sign gained notoriety after Maurice Campbell tweeted it when he visited the village in one of the most beautiful areas of Ireland – the Ring of Kerry. "I thought it was out of order. It seemed nasty," said Campbell, who is from Northern Ireland. Last year, 930,000 U.S. travelers went to Ireland -- up from 778,000 in 2010. "Sorry you had to see that. I'm from Cahersiveen, the town before Waterville, and we welcome all Americans, loud or quiet," tweeted Niall O'Driscoll.

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- Amy Langfield, CNBC