A pipe was embedded in concrete with hardware attached to hold a gate. The pipe was covered in a wide range of stickers.

A pipe used to hold a nearby gate was also covered in a wide variety of stickers.

A closer view of stickers on a pipe allowed them to be partly read.

Another view of the same pipe, but lower to reveal more stickers in detail.

A nearby short pipe was used to hold up a sign. Here was a closer view of the stickers on that pipe.

Another closer view revealed that some of the older stickers had become erased by the sunlight.

A sticker below the gate hardware on a pipe read, "Be Brave Bold Robot."

A cover on top of a sidewalk drain pipe was also covered in a few stickers.

A horizontal pipe over a window was also covered with many stickers.

A few stickers, as well as a couple wrap ties, were attached to a bent pipe.

A closer view of a few stickers revealed one that read, "Wellsville."

A closer view of a sticker with a picture of a man wearing thorns under the words, "SF Understood."

A sticker affixed to a bent section of pipe read, "Stupid Doo Doo Dumb."

A large pipe at 240 Fell Street, San Francisco, had a few stickers attached, one of which read, "Pounds, After Dark Posse, Garbage Pail Kids."

Higher on the pipe at 240 Fell Street, San Francisco, was attached a sticker showing a wolf wearing red shorts and yellow shoes.