Barcelona's celebrated street transformations remain a continuing urban project after the paving is finished. Their harder questions concern movement, maintenance and who can keep using the neighborhood as its desirability changes.
Shade, air and stored heat give a courtyard its climatic work. The lesson of traditional buildings lies in the relationships they organize—relationships a contemporary project has to adapt to its own weather, occupants and surroundings.
A city's cycling network earns its value between the photographs: at junctions, outside shops, through winter maintenance and across municipal boundaries. Copenhagen's transferable lesson is the attention given to a trip someone needs to repeat.
A usable day out depends on reliable information, transport, facilities and a way to recover when something changes. Accessibility improves when a city connects those parts and lets people judge the details against their own requirements.