If you like cantaloupe, an ambrosia melon will strike you as, well . . . ambrosia.
I have never encountered one in a grocery store, but talked to the farmer at her booth during Hot Harvest Nights. Watch out, she warned - a whole melon can disappear before the second person gets to try it!
Could it really be that luscious? Yes. But I only ate half the melon on my first try.