A fellow beginner here, so take this with a grain of salt, but one thing you might consider is using a longer focal length in portrait orientation and stitching a panorama instead of relying on the wide angle to "fit" everything inside one frame. That might let you emphasize those "objects of interest" that Zoe B. mentions, e.g. the ring of bicycles chained up along the fence in the first image. (FWIW, I will concur with her evaluation of the last image, though!.
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Otherwise, I think any landscape photographer is at the mercy of light--at a different time of day (or season of the year), with different atmospheric conditions, the first and third captures especially might really pop. As good a reason as any to keep your camera near at hand, I suppose!