The truth about Sweden
The minor crisis in journalistic integrity is over. The person who sent me the photos had not meant to imply that they were his own, which was why he couldn’t provide any additional information. I did find the original source, which was a link on NCDSA.com from a Swede named Toby:
It’s an old timber trench/ditch that isn’t used today. All you need is a broom to clean it out in the spring and you’re good to go. It’s about 450 yards long and made out of metal. If you ever are in Umeå, Sweden, mail me and we’ll take you there!
Toby has two photos and videos of the ditch/pipe mixed in amongst three pages in an incredibly slow gallery. They are more atmosphere shots than gnarly skateboard action. Same goes for the video. Looks like a really fun spot.
