In a large dutch oven, add the chicken, vegetables, and spices.
Add enough cold water to fully cover all of the ingredients. Set the pot over medium heat and bring to a boil.
Reduce the heat, cover, and simmer on low (just a few small bubbles on the surface) for 15 hours.
Check the broth periodically and add more liquid if it's getting low (the ingredients should stay submerged).
Once the broth is done cooking (it will be a deep caramel color), remove it from the heat and let it cool slightly.
Set a sieve on top of a large bowl and spoon the contents of the pot through the sieve into the bowl. I usually strain mine three times. Discard the solids.
Store the broth in airtight containers in the fridge. You can also let it cool slightly, add to freezer bags, and freeze flat in the freezer.
Use it to make soups, rice, and lots more. You can also simply drink it (some people drink about 2 cups per day for health benefits).