Which river has the largest tidal bore?

The Qiantang River, in eastern China, is best known for its dramatic tidal bore, often called the Silver Dragon. When seawater surges upriver from Hangzhou Bay, it can create a powerful wall of water several metres high. The phenomenon is strongest around the time of spring tides and depends on the river’s shape, shallow estuary, and funnel-like bay. The Qiantang bore is a major local attraction and has been observed and recorded for centuries. It is one of the most spectacular tidal phenomena on Earth.