"Are there known cities which confronted their past ?"

Yes, absolutely - Berlin is the canonical example. The site of the wall isn't paved over or hidden, it's a line of bricks that runs right through the city, with several museums and memorials along its length.

The site of the Fuhrerbunker is marked with a sign, despite now being a carpark.

The memorial to the murdered jews of Europe stands as a chilling, disorienting reminder.

There are brass plaques, the famous 'stumbling stones' in places where individual jews were persecuted, marking their names, dates of birth, death and eventual fate (if it was known).

In contrast, Russia's soviet history is often glossed over or lionized.