One's castle is one's home!
Castle Sites offers a fascinating and detailed look into the workings of seven fantastic fortresses, inlcuding the following:
Kaurak Kholzil, a dwarven bastion built into the face of a cliff to protect a rich adamantium mine
Cloud Keep, the flying fortress of a storm giant clan
Dragon's Coffin, built to keep an ancient black dragon trapped inside its subterranean... [click here for more]