Usage patterns
湖畔を散歩するto take a walk along the lakeside
I like taking a walk along the lakeside in the evening.
湖畔に建つ〈物〉a building/structure standing by the lakeside
We stayed at a hotel that stands by the lakeside.
湖畔の〈物〉a lakeside ~ (cafe, cottage, etc.)
I had tea at a lakeside cafe.