One of the things that trips me out when traveling is the fact that foreign zoos let you get really close to the animals. For safety/liability reasons, American zoos keep you at least several yards away at all times. At the Berlin Zoo, on the other hand, you can practically touch the giraffes (perhaps more the point: the giraffes could touch you, were they so inclined).
This, however, takes the foreign zoo paradigm to a new extreme. Hat tip to Catherine.
It's my understanding that pandas can actually be quite dangerous, as their claws and teeth are sharp.