The Rio Carnival Parade

The Rio carnival parade is really something unique. It lasts for 2 full nights (plus an extra night for celebrations), il lasts usually 10 hours each night, with around 25,000 participants each night in wild costumes, and samba at full blast volume.

The Sambodrome is not really that wide, so they pack that strip dancing in rhythm and showing all the best.
And the parade in itself is a contest, with winners and losers and lots of singing and rooting.