The Terra treats kiosk is located on a pathway that leads to the "Africa" section of the park from the center "Discovery Island" area. It's closest landmarks would be the "Creature Comforts / Starbucks", a tiny Disney Vacation Club booth across the pathway, and some cute little Tamarin monkeys are located on the same side of the pathway, as the kiosk itself.
The is (or used to be) a noteworthy location because it offered allergy and gluten friendly snacks. While occasionally, we've seen "prepared" items available, this mostly translates into the same kind of packaged snacks that you can purchase at a convenience store... Flavored Rice Chips, Gluten-free Bagels, Hummus with Vegetables, etc.
At the moment, they also seem to have quite a few hard-ciders and some BBQ Chicken Wings.