Answer:
Pirates put their booty in it.
It stands upright and can be quite grand. Its secret is not hidden but right at hand. What is it?
It is a sound of empty, speak and it'll talk back plenty. But all the more you yack, you'll get the same words back.
I can be cracked, I can be made. I can be told, I can be played.
Describes a mysterious region and a stylish pair of shorts.
I can only be played on a windy day