A perfectly cubical fortress of doom in the middle of the Sahara or Arizona deserts, with a sniper tower jutting out of the center of it, and 8 gattling cannons, one on each corner, and on the center of the sides. Then it is going to be surrounded by anti-personal and anti-tank mines everywhere, as well as lots of barbed wire.
And it's going to all camouflaged so that pesky Google earth won't be able to see it, and inside would have my research labs, experimenting with all sorts of destructive technology that I have devised (sonic harmonics weapons, proto-type plasma weapons, chemical weapons of doom, genetically engineered biological lysogenic viruses, whatever.), and it will be fusion powered! The water supply would come from drilling down deep enough into the aquifer, or it can come from a desalination plant located near the ocean, with pipes and pumps that bring water to the base.
Name: La Vasteland