What does a canal lock look like?

A canal lock is a structured chamber with gates at both ends, designed to raise or lower boats between different water levels. Typically, it features walls made of stone or concrete and may have mechanisms like sluices or valves to control water flow. When a boat enters, the gates close, and water is either added or drained to adjust the water level. The overall appearance often includes steps, walkways, and sometimes accompanying machinery for operation.