Unreachable when you get there, for example theres one here - http://goo.gl/maps/irphC (at [URL="https://maps.google.co.uk/#"][/URL]Streatham Water Works) where it's inside the fence. You can't actually hit 2 of the resonators on it, and 2 only get caught, as they are too far away from the road, meaning its permenantly smurfed.
Unreachable when you get there, for example theres one here - http://goo.gl/maps/irphC (at [URL="https://maps.google.co.uk/#"][/URL]Streatham Water Works) where it's inside the fence. You can't actually hit 2 of the resonators on it, and 2 only get caught, as they are too far away from the road, meaning its permenantly smurfed.