I really like the blend of inorganic contours and natural water/birds in this image, giving it a sense of nature reclaiming an abandoned city. At the same time, the lighting scheme makes the overall effect positive and natural, rather than oppressive (as that theme is usually displayed).
I like the warmth in this picture and the two suns. I somewhat find worlds with two suns to be somewhat interesting if they're not balant Tatoonie rips. This looks amazing, like a view through a canyon in the sunset.