I can't decide if the second is actually tilted or if it's just an illusion ... maybe a bit of both?
Lots of nice detail to explore in the first. Maybe the camera club judges will be looking for shots that use the shortening perspective of telephoto rather than just a distant view brought closer.
It amazes me too. There are walls like this all over Scotland, Wales, England... hills all over Europe... Greece has tens of thousands of miles of them... Turkey... and beyond... americas ... asia... Millions upon millions of man hours. Awesome.
A telephoto lens gives the impression of making things that are in fact some distance apart seem closer together - the view seems compressed or flattened. Think of multiple ranges of hills one in front of the other. In fact they may be miles apart, but a telephoto shot will make them appear like layers of cut out paper one on top of another. This discussion explains better than I can manage; www.australianphotography.com/news/photo-tip-of-the-week-use-the-power-of-telephoto