The fruit known for its green exterior and sweet red interior is the watermelon. Watermelons are a popular summer fruit, largely due to their refreshing taste and high water content, which can be about 90%. They have a smooth, green rind that can be dark green or striped and a sweet, juicy interior that is typically red or pink, filled with black seeds or seedless varieties. Watermelons are not only delicious but also nutritious, containing vitamins A and C, as well as antioxidants. They are often enjoyed fresh, in fruit salads, or as juice.