Actually, I've already found a couple of weird stuff, even though I have only found 33 caches in total.
Firstly, on part 3 of a mystery-cache, while searching thoroughly in the area, my caching mate suddenly looked into a big tree, and came back with a huge shovel, just laying on some of the branches.
Two days after, we were out caching again - this time stumbled upon a snake, which is kinda rare to see in Denmark.
Later that week, we went to China together and found some caches there. In a log for one of the caches, someone wrote that people tend to use the spot as a place to "relieve themselves", which we first thought meant that it was used as a toilet for homeless people. When we arrived and found tons of used condoms, we suddenly understood what he really meant. And as we were looking at all the condoms and laughing together, suddenly a couple came out from some bushes - the women laughing, and the man zipping his paints.