In my part of the world I am known for a "Just Because" series of 25 geocaches that sprung from someone who stuck the same pill bottle in the same predictable place in every guardrail along his travels. I loved the g'rail concept, but thought that there ought to be a more fun (aka devious) way of hiding geocahes. So my "signature" hides are listed as "on, above, below, inside, behind, or near" a gaurdrail. On top of that, did you know that there are about 15 unique places on gaurdrails in general where one can hide a container?
Seldom found in the "normal" place, I may still hide them in the "end" of a rail. Just as often as not, the rail is only a "beacon" that draws you close to the true hiding place.
You know, I could go on rambling about all of this. However, you could go on looking for it! Wouldn't that be a WHOLE lot more "fun"?
As always, be safe, be smart, keep a sense of humor. It's only a hobby after all.