Old Dock

The Old Dock, originally known as Thomas Steers' dock, was the world's first commercial wet dock. The 3+1⁄2 acres (1.4 ha) dock was built on the River Mersey in Liverpool, England, starting in 1710 and completed in 1716. It was built on the site of the Pool, a natural tidal pool off the River Mersey, by partially filling and locking it in from the river with quay walls erected.

Wikipedia →