Love Pomelo !

Not ready yet to eat.  The photo does not do them justice - each one is about 7 or 8-inches high and about 22-inches largest around.  The white pith just under the yellowy skin can be 2 to 3-inches thick or more.
Don't know if these are yellow inside or pink.  Very similar to grapefruit. 

These were up on a wall below the tree and happened to see the owner out in the yard.  He says pls take them, got plenty more.  Yippeeee, plenty to share . . .   pass 'em on!