From the Atlas of Plucked Instrument, a wonderful website dedicated to string musical instruments, comes this weird contraption called a "ramkie" from Southern Africa:
The ramkie is the famous "blik kitaar" from Southern Africa; a home made guitar, using an empty oilcan for the body.
The wooden neck is sometimes stuck all the way through the can; sometimes it is fixed to a wooden "lid" on the top. The 4 to 6 strings (if not of nylon) are made of unraveled bicycle brake wire. The frets are made from U-shaped pieces of wire stuck in the front of the neck.
The kind of capodastre construction is usually just an upside-down bridge and can not be moved.
The ramkie is mainly found in South Africa, Botswana and Namibia.
See much, much more at Atlas of Plucked Instrument