Praia do Farol da Barra.png - leaning horizon, lacks sharp focus, and perhaps over-saturated
Praia do Farol da Barra.png - chromatic aberration and strangely blurry areas
Farol da Barra.png - leaning horizon and oversaturated
Why did you post these in png format? png should be used only for images with transparency. The very narrow crop also seems non-standard, though I'm not sure that's a reason for the Moderators to reject.
Have a read of this. It's a brief guide on quality:
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The first photo has a white balance issue. It seem to have a slight blue/purple appearance on the wall. I'm not sure where you placed your focus but might be a little too far on the landscape. The sea color looks a bit over-saturated.
I'd say add a little more exposure to the second file. A small amount of grain noise is visible in the water in the forefront. Again there might be an issue where you placed the focus.
The third file has a white balance issue. The road is slightly blue.
Please zoom into your file at 100 to 200% to view them for errors.
Thanks Jacquelin!! You help me a lot!!