I really love urban trees. In the city you seem to pass them by without even noticing. Urban planners in America were big on placing parks in the middle of cities. They believed it would create a piece of tranquility in the middle of a hectic city headache.
Manchester has a couple of parks, discreetly tucked away in forgotten corners. Stepping into them is like jumping through a portal. You can still hear the traffic, smell the smog, but everything is still.