Tons of cities have hidden underground streets that are the old street level and now abandoned due to all manner of modernization.
Walking around Chicago I often see houses where the front door is a couple of meters below street level because the house never moved its door to an upper story when the city was releveled.
Walking around Chicago I often see houses where the front door is a couple of meters below street level because the house never moved its door to an upper story when the city was releveled.