I have always liked juice. Really liked juice. So having been to South America my mind has been totally blown away by the virtually free (.50 to $1.00) juices that lay the juice available in the states to shame.
Rank by country:
1. Colombia - Consistently good juices, maracuya, papaya, guayava, piña, limonada, lulo, guanabana, mango, moro, melon, banano, and more.
2. Peru - The mercados are the place to get juice in Peru, where you´ll find rows of juice ladys ready to mix up any concoction you can think of. Even a frog smoothie, consisting of a freshly killed frog, smashed on the edge of the counter, skinned alive, boiled alive then thrown into the blender with banana, grains, honey and some piña juice to take the edge off.
3. Bolivia - Juices are to be found near mercados, sold by street vendors. The juices here are loaded up with sugar and topped off with some puffed rice for "health".
4. Argentina - They don´t drink juice. Or eat vegatables aside from mashed potatoes or squash.
OK.
Now ranking by city.
1. Cusco, Peru (Altiplano) (anything your heart desires that can be juiced)
2. Taganga, Colombia (Caribe) (iced juices to take the edge off of the heat)
3. Leticia, Colombia (Amazon) (all those crazy amazon fruits blended up just right)