what caches have you experienced that involved some type of solving, decoding, decrypting?
i am talking about caches where solving the location is a game all in itself. these are also caches that might be fun for a person to "solve" even though they may not be able to physically find the cache.
my interest stems from my own *very* challenging puzzle cache which no one has solved:
the dragonfly scroll
i invite anyone, anywhere to solve it.