Test Your Imagination -Trade-

This is a trade with Her character Tigress.
I know a lot of you will question "what kind of background is this?"

Well... I had several ideas but I kinda messed it up a little. My original idea was a building in perspective. Then I made it into something else like an object seen in fictional stories.

Also looks like waterfalls but since I didn't intensionally going for that, plus her clothes and hair not soaked. Thus, it couldn't be.

To me this result looks like Tigress walking under the tunnel where you see light coming down from the holes above.