Traveling to somewhere you've never been is a hard enough 
challenge to overcome. Chances are you're coming in to contact with new 
languages, new cultures, new people, and new foods. Most of these things
 you can deal with and return unscathed. But if you aren't careful, 
eating out while on vacation isn't one of them. If you don't know the 
language, customs, or food of the place you've chosen to take a trip, 
eating out could end in disaster.
One of the most important thing 
you need to look out for while eating out on vacation is whether or not 
you're in a location where drinking the local water is safe. Of all 
places to travel, Mexico is the most well known for having unsafe 
drinking water. Most developed countries are safe, but it's best to 
check the Center for Disease Control's website to see which areas are 
truly okay and which are not. Even if you are somewhere that the water 
is fine to drink, but you don't want to take any chances, you can drink 
bottled water and cold, bottled soft drinks and other drinks. If you're 
worried about contamination, make sure you don't drink fountain drinks 
or ask for ice. These are both ways for water to enter into your drinks 
without you completely realizing it.