Buildings are all around us, a mix of designs, shapes, ages and styles. Interior and exterior architecture are equally important, it is very difficult to judge a building from the outside. Barcelona's Sagrada Família, the beautiful cathedral designed by Antoni Gaudí is a perfect example of this. Contrasting beauty outside and within.
The 'Open House' architecture weekend held in London every year is an excellent opportunity to see so many buildings that are hidden from view (unless you are lucky enough to work in them).
Public realm areas and mainline railways stations are being remodelled more and more with some very interesting and beautiful results worth capturing (that's another list I have!).