One of my favourite walks starts by parking in the National Trust Car Park on Lon Golff in Morfa Nefyn and, depending on the tide, walking along the beach toward the distant Porth Dinllaen then, after a bite to eat and a pint at Ty Coch (http://www.tycoch.co.uk/), a leisurly stroll up the cliff road and through the golf course back to the car park. Or, if the tide is in on arrival, the reverse.
Ty Coch and the houses in Porth Dinllaen are only accessible via the beach or via the restricted delivery road through the golf course. It is one of those "secret" pubs in North Wales that everyone seems to knows about. It's really popular on hot sunny days, especially with families (mostly because of the beach/pub combination) and boat owners (the natural harbour there attracting the wealthy).
Ty Coch has been a place I've always tried to visit when I'm in the area. It is a unique place steeped in history and natural beauty (a short walk around the headland often results in seal sightings). Its really handy for mid-walk refreshments and, at one point, it did live music of an evening in the pokey little bar area. I often think about whether there are other places like it in the UK - regularly cut off by the tide and only accessible via foot or sea. I'm sure there are. Do you know of anywhere like it?