I'm recommending Caradiru for your holiday week viewing pleasure.
This Brazilian gem is a rich portrait of prison culture unlike what American's are used to. The story is well told and irresistable. The actors are natural and honest in their intensity. This movie IS intense. Much like the colorfully brutal City of God, Carandiru, is a saturated experience. The story is thick. The people are real. The photography is phenomenal.
I'd love to see this film again.