One of the projects I am working on is 'Doors of the World.' This stems from an article I once read about a photographer that traveled the world and photographed doors. I can't say that I favor his approach of putting them all in collages, but I do have some of the same desires. For example, this door from India still hangs on my wall.
This group of doors can be found at the public entrance to the Jinshanling Great Wall of China. It was off-season, and the place was deserted, but this wall of windows and doors captured my eye.
This set of doors is found at the Great Wall of China entrance near Beijing. The bright red color has started to fade over the years, but I still love the texture and weathered look of the multiple doors.