Pomelos look like beefy grapefruit, but they taste sweeter - like a combination of grapefruit and strawberries. I found them to be "drier" too. They are the largest citrus fruit ranging from extra-large grapefruit size up to the diameter of a basketball (thanks Wikipedia)!
Pomelos are also known as Chinese grapefruit, pummelo, pommelo, Lusho Fruit, jabong, pompelmous, and shaddock. [Photo by John Panzarella]