Hi,
For me the only one that works is the wide shot of the wall, the others lack a focal point or a reason for taking the photo that someone that wasn't there will understand. For example the last one of the cable cars is, to me, just that 2 non descript cable cars, but I'm sure you took it for a reason.
The wall shot works as you get what you are looking at and the sheer scale of the wall as it disappears off into the background. The wall also naturally draws your eye in and through the photo.
None are bad shots, they just lack a subject or story.