The Bay is known for hosting the world's largest tidal bore, up to 9 meters (30 feet) high, and traveling up to 40 km (25 mi) per hour.
Yanguan Town Tide-Viewing Park (盐官镇观潮胜地公园 Yánguān Zhèn Guāncháo Shèngdì Gōngyuán), on the north shore of Hangzhou Bay some 50 km east of the city of Hangzhou, is regarded as one of the best place to watch the Qiantang River Tidal Bore, especially on the 18th day of the eighth lunar month.
It runs across the mouth of Hangzhou Bay connecting the municipalities of Jiaxing and Ningbo in Zhejiang province.
It stretches 10.14 km (6.30 mi) across the Qiantang River estuary and carries the G15W expressway, four lanes each way, over six consecutive cable-stayed spans supported by six tall pylons.
In 2018, the Zhejiang provincial government, following in Guangdong's footsteps, released ambitious plans for the Hangzhou Great Bay Area, aiming for a mega urban re-development schema that would double the economic output of the region by 2022 and develop a “world class” bay area in Zhejiang by 2035.