The circuit around the old city gets crowded. So the powers that be cordon off the street into a single path. You walk in one direction. You can bail out but you may not walk against traffic. This is really pretty funny since cars are going the wrong way on one way streets all the time. But here, everyone walks in the same direction. And they enforce it! So the first time around I got a shot. And the second time too, because I was not sure the first worked. You don’t want to be too obvious and check. And you cannot go back unless you go around again. Well, I did.