RF3A3FFJJ–Red security gate with a diamond lattice pattern guards the entrance of a vibrant green and red-painted urban building in Chicago
RFS01XW2–Stack of scaffolding elements
RFS07EK2–Chunky bolts in an engineering girder in a repetitive pattern
RFS48WFF–Beautiful view through the window with metal mesh lattice over the roofs of the winter Tallinn city with the red sunrise reflecting in the next window