Viola da terra from the islands of the Azores 

Here's one you don't see every day. A "viola da terra," guitar of the land. It originate in the Azores, some remote islands far off the coast of Portugal. It has 12 strings in 5 courses, tuned ADGBD.
I don't know how to play in the traditional way, so I played it like I might play an acoustic guitar. Let me know what you think!