A pomelo fruit actually looks like an insanely overgrown grapefruit — the skin and pith are quite thick and the flesh ranges from white to pale pink. In fact, they are probably an ancient ancestor of the grapefruit we eat today. The modern grapefruit is most likely a hybrid of a pomelo and an orange.

Read Related: The Citrus Gangster: 10 New Grapefruit Recipes to Try Now