When you think of watermelon, you likely picture a bright green rind with a red center, but surprisingly, there is another type you can enjoy: yellow watermelon.

Yellow watermelon has roots in Africa, making its first appearance around 5,000 years ago, but it's not widely available and is slightly sweeter than its red counterpart.

Specialty grocery stores with large produce sections are likely to carry this fruit, and even Trader Joe's tends to stock it during the summer months.

To find the best watermelon, you can use the same trick for yellow that you would for red watermelons: Check for its “field spot,” or yellow belly.

A field spot is a discolored part of the melon that rested on the ground while it was growing. If the spot is large and yellow instead of small and white, then the melon is ripe.