To me 7/11 at TOC is the obvious choice.
#7 Pennard
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#17 Littlestone - though I probably wouldn't nominate it for this thread
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#10 Princes - a possible candidate if only because the green is incredibly harsh given the length of the hole and wind
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#9 Sandwich
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#6 Ballybunion Old
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I think #8 is the best Ballybunion candidate
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#9 Ballybunion
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#9 Lahinch - the
very long green sort of wraps around the dune
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Strandhill's 5th is cool because of its position and the front drop, but I think the 1st is a better green for such a reachable par 5.
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#14 Nairn - wonderful green and brutal for such a long par 3
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I also forgot a great candidate - Burnham & Berrow's 16th
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Co Sligo's 4th - I wouldn't nominate it for this thread, but I like the hole a load.
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Ciao