Philadelphia 471 by Michael Penn Street Photography - This is a great image because of the contrast between the dangling phone and the blurred people in the background. It seems ironic that the phone is still and not swinging while the rest of the image is in motion.
The orange and white stacks you see on the streets surrounding a manhole are there for safety - so people don't touch the steam vapor and get burned, since it is hot. The cones also elevate the steam vapor above street level so that drivers can maintain visibility. This steam vapor is caused by water falling on a steam pipe, or a manhole cover or due to a steam leak.
guilloche_cufGuilloché Cuffs by Gregory Phillips uses a virtual guilloché engine and 3D printing to create a modern, three-dimensional take on a centuries old machine method for engraving intricate, repetitive 2D patterns.