One of the things that trips up tourists, especially from the United States, but other developed countries as well, is the differences they encounter when traveling, in hygiene. For example, toilets. In some countries, restroom facilities are clean and beautiful. But in some developing countries, facilities may be more rustic -- hole in the ground, a drain next to a water spout, for example. It is always best to be prepared and learn about these things in advance so there are as few shocks as possible.