I thought of Dylan's first of all and had a look on Google Street view but couldn't see the posts and the boardwalk so I discounted it and didn't have any other clue except that it was on the Llyn.
A lovely location and good quiz Hollins

After we had a walk in Criccieth a while ago,we enjoyed a coffee and cake in Catwaladers, not quite as grand as Dylan's but still very nice with stunning views from the back