air vent two air vents in perfect symmetry. I found this photo while strolling around in the Boston downtown area. related photographs chase building curves v slim cut battery park fog | pole symmetrical life lines & texture the curves of a shopping mall phone lines british museum wind tunnel spiral worcester art museum Leave a Reply Cancel reply Your email address will not be published. Required fields are marked *Comment Name * Email * Website * Copy This Password * * Type Or Paste Password Here * Notify me of follow-up comments by email. Notify me of new posts by email.