In keeping with the Halloween theme (even at Christmas) here are some artfully done haunted gingerbread houses:
These and many unhaunted gingerbread houses can be found on this site:
If you are a real go-getter, you can create your own replica of the Disney Haunted Mansion in gingerbread form! Check this out...
This site will lead you through the pattern making and decorating process. It looks complicated to build, but the results are amazing!