This refreshing beverage may not pack the same punch as an energy drink, but no hot, sweaty roadtrip across the American southwest is complete without at least one stop for agua fresca, or "fresh water." Available at just about every open-air market, legit taqueria, and mom-and-pop convenience store, this delicious drink is little more than syrup, water, and whatever fruit is in season. It's like a taste of Mexico — without worrying about the water.