Mental institutions, especially old, abandoned ones.
In the woods.....at night..
the white house
Between my ears. Also the happiest place on earth. Makes Disney World look like the Valley of Death.
An old outhouse.
cemeteries(but I have been stocking up on my zombie apocalypse survival skills) The energy freaks me out though.
In your bed, next to you
Valley of death. http://www.forteantimes.com/features/fbi/2800/valley_of_death.html
in africa there are pits in the ground where carbon dioxide collects, animals go in and die and then other animals try to eat them and they die, leaving a foggy pit of skeletons
o.O You win!