Seville, Spain is the namesake of one of the most famous oranges, and the oranges are everywhere. Orange trees are common in parks and along streets, and there are often fallen oranges underfoot.
Walking the streets and seeing all these left me craving citrus—but sadly, the Seville orange (also known as a bigarade orange) is not for eating. It's a sour or bitter orange that's best used for marmalade because of its tartness and high pectin level. In fact, the oranges of Seville, when harvested, are mostly shipped to British marmalade makers.