Outdoor, Horizontal Fences, Wall, Metal Fences, Wall, and Walkways At Tanner Springs Park, the water from Tanner Creek that used to flow through freely, now pumps through large pipes beneath the streets. The art wall is constructed of 368 railroad tracks and 99 pieces of fused glass that’s inset with images of insects and animals. The creatures were hand-painted by Herbert Dreiseitl on Portland glass. The art wall also acts as a divider between the park and the street.  Photo 8 of 11 in These 11 Modern Fences Bring a Whole New Meaning to Curb Appeal from A Weekend in Portland: Part I