http://www.hongkiat.com/blog/100-captivating-examples-of-urban-decay-photography/

I like the contrast between the grey tones of brick and the bright blue and white sky. Natural light is used in this photograph, the light is shining from behind the building casting shadows on the ripped bits of material hanging on the barbed wire fence. I will use a lot of natural light in my photographs where I can as it can give an atmosphere to a photograph that you just cant get with man made lights. Also the composition on this photo helps to create a certain feel, the way the camera is looking up at the building over the wall makes it look intimidating and the barbed wire shows that there's no escaping.