THE QIANTANG RIVER’S TIDAL BORE IS THE WORLD’S LARGEST & MOST POWERFUL OF IT’S KIND

The Qiantang river's tidal bore is the world's largest and most powerful of its kind.

It forms a wave that can rise to a height of 9 meters (30 ft) and travels up the river at top speeds of 40 km/h (25 mph) against the direction of the river.