Jews hid for more than a year in a cave in the Ukraine during WWII. I'd never heard this story, and it was absolutely incredible. I'm floored. They lived in near total darkness, only lighting their scarce candles to cook. Wiki summary HuffPo: 'No Place On Earth': Jewish Cave Survivors Of WWII 'Lived Like Robinson Crusoe' (INTERVIEW) The film: No Place on Earth Nat-Geo: The story I want to see it again.