In some neighborhoods you can see where the street was raised but building weren't. There's a gap of a few feet between the sidewalk and the building where you can see down to the level of the original street and the former street level floor of the building now looks like a basement.

Off the top of my head you can see some buildings like this in the blocks North of Division between Ashland and the Kennedy.

Here's an example from that area: https://www.google.com/maps/@41.9042461,-87.6638461,3a,75y,2...