Video (3:17): The tango from a surprise performance by Maestra Olga Besio and her daughter, Ariadna Naveira, on Saturday night, July 26, 2014 at Tango Element Baltimore 2014. And they danced a tango vals too.

Video (3:04): The tango vals from a performance by Maestra Olga Besio and Ariadna Naveira, on Saturday night, July 26, 2014 at Tango Element Baltimore 2014.