We've already seen how to camouflage a toilet. Just replace it with a metal hole in the ground! This, however, is an example of a camouflaged sink. If you look closely at the following photo you can see the camo-sink in its natural habitat (a Thai restaurant in New York):
Seguin writes, "5 out of 8 people using this bathroom could not find the sink...kind of defeats the purpose when no one in your restaurant can wash their hands."
(The water comes out of one of the bamboo stalks that has a utility handle on top.)
PS: Look at the second photo, with seemingly two toilets. It took me about 10 seconds to realize that the background was simply a mirror and not a view into the neighboring stall.