If you inherit land from your grandfather and then pass away does that land go to your spouse or children?

Generally:

It depends on the circumstances. If the grandfather died and left his property to his children and one had predeceased him, the predeceased child's children would generally inherit their parent's share as heirs of their grandfather.

If you inherited property from your father, your interest will generally become part of your estate and pass according to your will or the laws of intestacy if you have no will. Under the laws of intestacy your husband would inherit all or some of your interest.

You need to consult with an attorney in your jurisdiction to determine what your options are under your local laws. You can check out the laws of intestacy at the related question link provided below.