An earhtquake destroys the barrier wall of the artifical lake located only 50 km away of Switzerland biggest city, Zurich. Within an hour the whole city is set under water.An earhtquake destroys the barrier wall of the artifical lake located only 50 km away of Switzerland biggest city, Zurich. Within an hour the whole city is set under water.An earhtquake destroys the barrier wall of the artifical lake located only 50 km away of Switzerland biggest city, Zurich. Within an hour the whole city is set under water.