List of Portland abandoned buildings?

So i'm looking for ideas of abandon buildings in the portland oregon area. I checked out the old building near the saint Johns bridge. Pretty good challenge to get in with out the guards knowing. So hopefully some one has an idea of a slightly less secured place. The only other place I've found is the "UP factory" across the river. Needa go check that out. So any one have any ideas of good exploration? any one wana hook up for a joint venture some where?