Camden Locks are famous for the nearby fashion market, but these locks are actually still operating. What is even more interesting is that it is still a manual process.
Step 1: The upper lock is manually opened.
Step 2: The boat gets in the lock and the upper lock is closed.
Step 3: With a crank the valve of the lower lock is raised so the water can get out.
Step 4: The water gets out and the boat is lowered.
Step 5: The lower lock is opened (in this case by a guy pushing with his ass).
Step 5: The boat gets out.
All pictures taken by myself.