I am always impressed by this kind of things, I was looking for pictures of dirty appartment and finally I stumbled across this cool website: Squalor Survivor:

Squalor is a confronting word. It's a degree of mess that goes beyond untidiness. The state of the house deteriorates, small piles become big piles, then even bigger piles. Sometimes beds can't be slept in, tables disappear under clutter. Appliances and equipment can't be used. Perhaps they broke down, but you fear a repair person will report the mess, or access is blocked by other items.