Not far from where I live in Paynesville is an abandoned part of an old trail (part of the Glacier Lakes State Trail) that prior to being a biking/walking trail was the Burlington Northern railroad line. Not exactly sure why this segment was abandoned.
There are two bridges on the trail, one tall & long and spanning over the river, the other shorter in length and spanning over a pond. Since there is no maintenance being performed on the trail, these bridges are being reclaimed by the plant growth. Its amazing the potential for something to grow in a minor crack or crevice.