You guys have me beat ...
In commercial / industrial locations, I often find a trail of empty whiskey bottles, or (in the pre-internet days) collections of pornography.
In residential locations, there have been the various animal traces. The animals themselves have invariably taken one curious whiff of the intruder (me) and scurried away; the exception being wasps. To be fair, our "possum" over here is somewhat different from the Kiwi version. (Ours is technically called an Opossum).
One house disposed of their old carpet by laying it in their crawl space- and using the area as a play room for their little kids.
I have one industrial site that is infested with copperheads - a poisonous snake, comparable to the old-world asp.
All I find seems to fit into three categories:
1) Trash left by previous tradesmen;
2) Amateur electrical work; and,
3) Evidence of illegal drug use.
