A lock on the River Lee with narrow boats moored on either side.
Higher reaches of the Lee are too narrow for wide barges to navigate. Narrower boats were needed which are simply known as narrow boats. No longer used for freight they have been converted to pleasure craft; houseboats. Some are lived in the year round but most are homes-away-from home for a weekend break and a cruise along the river.
You don't need a boat to enjoy the river. It's pleasant to walk along the towpath or better still ride your bike. An icecream won't go amiss.