Some ideas for the many changing faces of San Francisco, Paris, London and the Moon:
— Starfleet and the Federation have alternating "Naturalist Days" where grids of the cities or the Moon are temporarily presented in their pre-civilization natural state from the perspective of other areas of the city (or from Earth and space in the case of the Moon) through the use of forcefields, holograms, and replicated / particle-synthesized matter. People working inside these zones on the days in question are unaffected and their view appears as normal.
The Moon alternates between the city and domed (or forcefield-held atmo) lake covered appearance described by Riker and the natural appearance shown in several movies and TV episodes. Giant starbases and orbital elevators and artificial rings may also have mandatory holographic screening systems to allow the Earth and Moon to maintain their pristine paradise image when viewed by incoming ships, with structures only showing for collision avoidance or docking / landing.
— Ever since WWIII destroyed most of the world's major cities (not to mention the Breen attack, or in the Kelvinverse Narada drilling deep into Earth's mantle or outer core in SF Bay which should create a nasty super-volcano —thank goodness for Abramscience "Cold Fusion" devices to flash-freeze that puppy up— or Vengeance taking out half the city, or climate change sea level rising and one or more huge earthquakes and tsunamis), and the Vulcans assisted with rebuilding, various rapid construction and repair techniques have been employed. 3D printed buildings, industrial replicators, mass cargo transporters, giant automated construction crane robots, nano-assemblers, anti-grav lifts, forcefields, tractor beams, etc. are constantly shifting things around and rebuilding the cities on an as-needed basis. Starfleet HQ can literally grow a new hangar on-campus if need-be in a matter of hours.
If anyone has seen the excellent SF series 'The Peripheral' on Amazon Prime based on the William Gibson novel and made by the 'Person of Interest' / 'Westworld' team, it would be similar to the augmented reality of London (though not requiring the body implanted tech or being in a robot avatar) and the nano-assemblers rapidly constructing a building.
— San Francisco has very strong historical and cultural preservation, environmental protection, building height (though obviously less so in the future), earthquake, fair housing, and other rules and restrictions, as well as a thriving counter-culture, that might require more changes than most cities. Entire historical buildings or structures (like the Eiffel Tower in Paris or the Transamerica Building in SF) may be moved intact with tractor beam tugs and anti-grav platforms to make way for new developments. Historical areas like the SF Sanctuary District may be preserved in their original form under a transparent roof. Former industrial areas are returned to their natural state as those processes are moved underground, as per the TMP novelization.
