Design, interior map of Amsterdam
As you know, Amsterdam is located below sea level and is protected from it by a dam. According to legend, once the sea found a small hole in the stone, which under the pressure of water mass could grow, and then ... farewell and dam, and a beautiful city. But this threat was noticed by a passing boy and was not confused - having plugged a hole with his finger, he began to call for help. The city has been saved!