The flower in your photo looks like onion flowers — specifically, Allium flowers (the flower of an onion plant).
When onions grow fully and are left unharvested, they shoot up a stalk and bloom into a round ball of small white flowers like the one you shared.
Common names:
Onion Flower
Allium Flower
Flowering Onion
Scientific name:
Allium cepa (for common onion)
