世界最高的水壓船閘

走走搜搜才知道，彼得堡也有世界之最的建築。最高的水壓船閘。
The Peterborough Lift Lock is a boat lift located on the Trent Canal in the city of Peterborough, Ontario, Canada and is Lock 21 on the Trent-Severn Waterway.
The dual lifts are the highest hydraulic boat lifts in the world, with a lift of 19.8 m (65 ft). This was a considerable accomplishment at the time when conventional locks usually only had a 2 m (7 ft) rise.


靜水恆流














天陰了











光影線條的透視