The natural world is what attracts my photographic attention more than anything.  I could walk down sidewalks for days on end and not be inspired to take a single photo.  A quarter mile stroll through a park, however, there is no end to the possibilities: wide angle, telephoto, panorama, macro, over here, down there, at noon, at midnight.  There is always beauty in nature no matter the season or setting.  Perhaps that is the reason that I have spent a good portion of my adult life venturing through it.