Just a couple images I found on the web today ...
So the party is making its way along a stream or canal and comes across this maze. The interesting thing here, I think, is not so much the challenge of navigating through it, but the mystery of why it was put there in the first place.
This is like inspiration after the fact. I was just recently contemplating a weird PC class called "The Traveler" (no, it doesn't involve a red umbrella), and this image (by E. Gorey) popped up.