Hi Cocacola186,
My comments for what they are worth

The first one looks like it needs a bit more contrast to bring out some of the texture in that ancient brickwork
The 2nd & 3rd look like they need a bit of lens correction (look at the horizontal lines on the castle and compare them with number 4)
The 4th also looks like it needs a bit of lens correction as the castle appears to be leaning back - have you tried cropping the right hand side back (as you look at the picture) to just to the left of the walkway? Adds a bit of drama.
Phil