I was in Barcelona in the spring on a particularly bright day with blue sky showing behind some fluffy clouds. I took a long walk along La Rambla and ended up by the water. The Rambla de Mar was ahead and I continued my walk. There was a sidewalk where I saw a large sign describing the area. As I looked around there were many rows of boats in the sparkling water. It seemed to me that the water and the blue sky were exceptionally bright that day. It was a peaceful scene.
Look here for more sparkle.