There is also a Corvair (or rather the shell of one) from when someone trekked through in the 1960s. While no roads, it is hard to imagine there is not a pretty decent trail after a couple of years of this going on. On the other hand, the jungle can and will take back over after a few weeks.
The bodies of the countless dead migrants along the trail are carried into the jungle by jaguars and consumed. In the humid jungle, they are bones in no time.