The historic part of every little town I've visited looks pretty much the same: loads of buildings and cobblestone streets. No greenery, no trees, nothing. Just stones, stones, and more stones, with the occasional plaza. It's cool at first, but then you really crave something green (or at least some bare trees).

And the cars. Crazy traffic flows through all these narrow little streets. Pedestrians have nowhere to hide. At least the cars drive super slowly (otherwise you'd smash into the first wall you see).