Worth going just for the pictures (and poems) on this and nearby buildings and the surrounding area. It was very busy, but we found service quick and friendly (more than could be said for some of the other customers!). Good traditional Swiss food - rosti, fondue, lake fish - and wine. Don't suppose it was any more expensive than a similar meal in any Swiss city. Unlike another reviewer, I found the ladies' toilet quite clean and OK, although maybe not as pristine as some. Limited outside seating, but we were lucky; inside is very traditional Swiss. I think they also have rooms.
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