It's a Hydrangea! These gorgeous, blossoms are native to southern and eastern Asia (China, Japan, Korea, the Himalayas, and Indonesia) as well as the Americas. They come in a variety of colors aside from blue.
One of the islands in the Azores, is called the "blue island" because of all the blue hydrangeas that grow there.
Personally, blue hydrangeas remind me of summers on Cape Cod. I remember seeing these bright blue blossoms contrasted against the weathered gray or white siding of beach cottages. A beautiful sight!