Looking Upby
LERtasticComment: Greetings from the Critique Club!
First, let me say that I am not a professional or even a very good amature photographer, so you may want to take my comments with a grain of salt.
Meeting the Challenge: Great job here of course.
Composition: Perfect. You hear so much about the rule of thirds but sometimes it just makes sense to not follow it, and if done correctly, like here, I think those can be some of the most interesting photos. I may have cropped off a tiny bit of the top and bottom, to eliminate the black bump at the bottom left, but this is pretty minor.
Lighting: Seems very good. Every shape is emphasized and separate, while being a part of the complete whole.
Camera Work: You should be proud of what you did to get this great shot!!
Post Processing: Seems like you did a great job with the steps you took. I would have also cloned out the line on the middle arch on the left also, to preserve the symmetry.
Title: I like it. While your perspective is pretty self-explanatority, I would think, it is possible to be confusing to some and the title gives viewers a good reference.
Image Dimensions and Filesize: The filesize should be as close to 150kb as possible to minimize compression artifacts.
Misc / My subjective thoughts: I like seeing different approaches to things, symmetry that works, colors that blend and flow together... in short, I had a great time viewing and critiquing this photo. Thanks!
I hope this helps! Feel free to PM me if you have any questions. 
Photographer found comment helpful.
