Once upon a time, there was a village which stood near a big, flowing river.
Treacherous waters ran fast, whirlpools ready to catch imprudent people reckless enough to try swimming across.
The villagers had to walk miles and miles to ford and reach the other bank.
Many times, they had tried to build a bridge. Yet the river kept running wild and, at the first storm, burst untamed. Every bridges had been destroyed by the sheer rage of water.