In a moment of adventure I bought a pomelo at the grocery store.
It looks like a big grapefruit on the outside and inside too. But you have to take off all the white membrance around each section. In the end we like the taste, much like a sweet grapefruit, but can't decide it if it worth the work.
Now after adventuring out and tasting something so exotic, my daughter mentioned growing them in her yard in Arizona!