or so That 's ab er , i the street network of our geographic information system. And you can tell that we deliberately cut out this part. Because otherwise we couldn't get our GIS system to take  to lead people this way. It would always use the closest point to the object , and then the tourists would be faced , you know , in front of a wall , but it would do them absolutely no good. So ,  what we found interesting is , first of all , intentions differ. Maybe you want to enter a building. Maybe you want to see it , take a picture of it. Or maybe you actually want to come as close as possible to the building. For whatever reason that may be.
What 's it  what 's it made out of ?
Um , r red limestone.
So maybe you would wanna touch it.