Always said that popular Brazilian music and Mahler had a lot in common: the constant interchange between major and minor modes. Anyway, from Wikipedia . . .
On August 26, 2006, about 90,000 people witnessed a free performance billed as the "first-ever outdoor presentation". It was given on a specially constructed stage on Copacabana Beach in Rio de Janeiro, Brazil, conducted by Isaac Karabtchevsky leading 412 choral singers, 8 soloists and 171 instrumentalists. It included amplification, lighting, and video screens to accompany the symphony, marking a cultural achievement. (By coincidence, Esa-Pekka Salonen conducted the same symphony on the same evening (of the "first-ever outdoor presentation") at the Berwaldhalle in Stockholm, as the concluding event at the Baltic Sea Festival.)