Put your thinking cap on ….. you can have as many guesses as you want.
Spoiler alert: do not read any further unless you want to see what the answer is.
Solved by EllisMorleyPhto and Evelina Kremsdorf in an instant. The first person guessed that it was a row of train seats and the second added the all-important fact that it was a view of handles on a row of seats.
This would have been just a mundane set of patterns until I spotted a person starting to walk past me. That made all the difference, with a colour contrast and an extra dimension in the image.
I do not crop, enhance or post-edit my images in any way. Shot with a Pentax K100D, using a Sigma 18-125mm lens. F8, 1/60 sec, ISO 400, focal length 68mm.