I can't figure out what this structure is because it makes no sense. Big brackets supporting a two-piece cover? But it can't open, other than laterally, to the sides. Which seems improbable. I'm lost: that's always a happy place to be, thank you.
Nice perspective and detail - for my personal taste, I find the image rotated 90 degrees to have more visual interest - probably because it looks more disorienting, that way. I can't tell if the coloring/toning is part of the subject of the photo, or whether it's part of the post-processing, but I do like it.
I hoped that tunnel would look more heavenly and not as industrial... but each person has another perception of paradise...
The shapes and textures are really something, as Germaine mentioned