Photography attempts

I really enjoyed playing around with my camera on this holiday.  I wanted to do a lot of negative space (I think that is the term for it) and I would really appreciate any comments on these photos.  Remember that I have not been on a photography course, so if you have I would really be grateful for some tips and advice.  I only have a point and shoot digital camera, so keep that in mind too.  Thanks!

Symmetry,

random leaf, I love Autumn and I love moss, so that is why I particularly liked where this beautiful leaf had fallen.

Hay Clock Tower,

This was on the wall of a pub,