Our suggested one-to-two-hour allowance covers a flexible stop and nearby wandering, not the whole historic centre. Start with the landmark, then continue only as far as your group is comfortable. For a day trip from Hong Kong, decide whether the old town or Cotai is your main goal; trying to see every area can leave little time to enjoy any of them. A fixed ferry, flight or return crossing should shape the final sightseeing endpoint.
For an old-town visit, decide whether the ruins are your first landmark or the endpoint of a walk from Senado Square. This keeps the route coherent and helps identify a sensible place to rest. Group members who prefer fewer steps may choose a shorter visit; settle a reconnecting plan rather than expecting everyone to finish at the same moment. A photograph at the façade and a deeper heritage visit have different time demands. If you are returning to Hong Kong, make the last walking stop suit the confirmed transport arrangement instead of adding a distant attraction at the end of the day.
Before setting your schedule: check the official source for the date of travel, choose any tickets separately, and confirm the needs of children or travellers who require assistance. Keep your final sightseeing point and your onward journey in the same plan.