I made it as far as Dublin. After consulting my travel advisor, the oceanographer who had been most everywhere, another navy guy and I took the train down to Dublin. This took less than three hours with minimal customs formalities despite crossing an international border. Things changed a few years later when "the troubles" erupted.
On the morning after our arrival we met our travel advisor civilian who accompanied us on a Dublin bus tour. We ventured off to Trinity College where we saw the Book of Kells, then to St. Patrick's cathedral. I got to see the spot where Jonathan Swift was buried, standing up. St. Pat's is the national cathedral for the Anglican Church of Ireland. The semi-legal Irish Sweepstakes was big back then. We saw hundreds of women sitting at desks in a huge room hand addressing envelopes of lottery tickets. Last stop was at the St. James Gate brewery where Guinness was made and bottled. My navy buddy visited a geneology center to learn about his Irish heritage.
A visit to Dublin would not be complete without a pub crawl. And there were many pubs to visit. Not caring much for Guinness I stuck to other kinder, gentler brews.
We stayed two nights at the Gresham Hotel on O'Connell Street. This was an elegant old fashioned hotel. The Palm Court dining room was a winter garden full of, yes, potted palms. Cuisine was an ersatz French "franglais" style. Afternoon tea was a treat. Today the Gresham is a four star luxury hotel regarded as "posh" by Dubliners.