Picture the following: Our adventure/fantasy heroes enter some ancient ruins in search of something important or valuable. Although the site may have laid undisturbed for centuries or even millennia, the place is filled with a variety of lethal, fully functional traps left behind by the previous occupants. Said traps are often Bamboo Technology considerably more complex than anything else the creators were capable of making. Even more remarkable is the fact that they have not decayed at all, even if the environment is one that should require extra maintenance, and are just as lethal as they ever were, let alone the fact that any poisons should have decayed centuries ago. Projectile traps might even be capable of reloading themselves an indefinite number of times.