Actually, if you need to move fast over long distances, a flight is very useful.
But if you are visiting a region and its points of interest, a road trip would allow to stop at every chosen place.
For holiday tours and excursions, time is, usually, a bit less limited, and, depending on the "visiting programme, the distances and the local transport means", flights and the road are great, and I would add the boat, the train, funicular or cable car, hiking, cycling, riding and some other, less conventional means.
Seen from above:
On a boat
on the road and hiking: