Well, yeah. You pick those.
It's why Blue Origin does their tourist flights out in the desert.
We've even found some specific such sites. Forest coverage turns out to be a very minor issue on Mars.
https://www.space.com/nasa-perseverance-mars-rover-sample-re...
That's two of the most famous sci-fi franchises in the world, so I don't think sci-fi creators are as guilty of ignoring this possibility as GP seems to think.
Any supermarket car park, for a start.
Plus it would be handy for picking groceries so you can have a cup of tea and something to eat while you figure out how you're going to invade.