I am a pretty big fan of chocolate; but I don't think I'm alone.  Cacao is be cultivated and used for nearly 3000 years!
where does it come from? 
It comes from the "Theobroma cacao" seeds.  It seems to come from the Mesoamerican cultures.  The Mayans and the Aztecs used it in beverages known as "xocolatl"
does it provide any health benefits ?
The Aztecs believe it to be so valuable to them that they actually used the seeds as a form of currency!  As far as health benefits, it depends upon the types of chocolate from which it is made.  Dark chocolate is said to be more healthful than the standard milk chocolate.
sounds yummy, where can i get some ?
Chocolate is all around; obviously.  However, things like baking chocolate (also called bitter chocolate), without any added sugars.  If you want as close as you can get to its pure form, that is your best bet.  You can find it at many groceries stores.  
ok brb, on my way to a super walmart.
compared to those that have not had their cocoa butter content lowered. Lower quality baking chocolate may not be as flavorful compared to higher-quality chocolate, and may have a different mouthfeel.
Varieties.
It is typically prepared in unsweetened, bittersweet semisweet and sweet varieties, depending on the amount of added sugar. 
Recipes that include unsweetened baking chocolate typically use a significant amount of sugar. Bittersweet baking chocolate must contain 35 percent chocolate liquor or higher. Most baking chocolates have at least a 50% cocoa content,
alcoholic Chocolate.
 – chocolate is a processed, typically sweetened food produced from the seed of the tropical "Theobroma cacao" tree. Its earliest documented use is by the Olmecs of south central Mexico around 1100 BC. The majority of Mesoamerican people made chocolate drinks, including the Mayans and Aztecs, who made it into a drink known as "xocolātl" , a Nahuatl word meaning "bitter water".
- List of chocolate drinks
Non-alcoholic Plant-based.
Non-alcoholic Plant-based Barley.
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