The Big Picture has a gallery up on the Tango, which is on the official UNESCO List of Intangible Heritage in Need of Urgent Safeguarding (along with various poems, dances, songs and festivals from around the world, and - disappointingly - absolutely bugger-all from South Africa).
My wife and I spent our honeymoon in Buenos Aires, and lemme tell ya: they sure do like to tango over there.
Reckon I'm going to fire up some Gotan Project to get the memories flowing...