A full schedule can let transport and waiting consume the visit. Choose one main attraction, then find nearby meal and rest options rather than repeatedly crossing the city.
Discuss walking limits, breaks, toilets and dietary needs, especially with children or older travellers. Distance alone does not describe the effort: steps, sun and queues matter too.
Keep one optional stop that can be dropped. If a visit takes longer, the weather changes or someone gets tired, use that time to rest. Fewer stops need not mean a less meaningful day.