The tango as a dance originated in the South American city of Buenos Aires. The tango is a vibrant and playful dance between two people. It has very rich potential for expression, improvisation, and connection and is danced in both modern and traditional styles.

Tango is a dance that specifically originated in lower-class living areas (working-class slums) of Buenos Aires. Today, many Buenos Aires city neighborhoods ( La Boca, San Telmo, and Boedo) have their own particular tango history. This is a dance that has influences from African, Native American, and European culture. Dances from the candombe ceremonies of former slave peoples who lived in Buenos Aires have helped to shape the modern day tango. Many variations of this dance currently exist around the world.

More Info: en.wikipedia.org