Two Jack Lake
This photo has too much unsharp mask (in my opinion). Notice how the sky gets lighter and the mountains get darker right at the edge? It doesn't actually look like that in real life. If you zoom in past 100% you can see the telltale signs of unsharp mask on the edge (see attached) creating extra contrast at the edge.
It would probably be better to sharpen the original size image, then downsample, then sharpen just a tiny bit more if necessary (depends on the downsampling algorithm). But I don't have the full size image, so I can't try it.
candyman's last image looks kind of similar, but I'm not sure it's too much sharpening. The "&" symbol has a weird glow to it. Maybe it's how the exposure was adjusted to make the scene look natural with the wide dynamic range, or maybe it's HDR?