Where can I get a list of places I can use my Bitcoins? I am new to Bitcoin and I'm trying to understand how it works and how I can make it work for me. 

So, let's say I travel often to different Spanish speaking countries in South America and Spain. How can I acquire a list of all the vendors, merchants, services, etc. that use the Bitcoin exchange in all these areas to avoid using the banking system of "money transfer?"
You can try CoinMap. It's the largest database of physical locations that accept Bitcoin.