I have been in old Quebec City for three full days, and it has been a lovely visit. Old Quebec is compact and walkable with the exception of the fact that old Quebec is really just a series of stairs and slopes. Thus something may be just four blocks away, but it is also the equivalent of eight stories higher, so plan accordingly. The old town is surrounded by its original fortification walls, with a citadel at the highest point. Many of the streets are cobblestone, and most of the buildings are clearly original.