In case you climb the rear peak of Mount Qingcheng (青城山) there is a small lake in the way. The only option to cross it is to jump on the ferry which goes from one side to the other. Be careful to reach the last one: after it gets dark, the ferryman goes home and you have to sleep at the surprisingly frightening ancient town a few hundred meters higher.
(Oh, by the way: this entry was written by Peter Molnar, and originally posted on petermolnar dot net.)
