Okay it's a creek not a river and it wasn't built by POWs. 

It was about five years ago Little Cacher One went on a walk in a park with the Scout Troop and we found some Tupperware in a stump and I logged my first find. So...people hide stuff all over and a lot of it might be near my house?

"What Have I done?"

(spoiler clip if you haven't seen the movie) 

If you have seen the movie I'll bet you're whisting.No room for a pen or trackables here.

note: you do not need to be in the wetland or tread on any plants.