             if annotation.isKindOfClass(MKCircle.self) {
                 pinView?.pinTintColor = MKPinAnnotationView.greenPinColor()
                 pinView?.canShowCallout = true
+                pinView?.rightCalloutAccessoryView = UIButton(type: .DetailDisclosure)
             } else {
                 pinView?.pinTintColor = MKPinAnnotationView.redPinColor()
                 pinView?.canShowCallout = false
+                pinView?.rightCalloutAccessoryView = nil
             }
             
             return pinView

    }

    // -
    func recalculateCircle() {
        if let first = first, second = second {
            if let circle = circle {

        // Obj-C interop is hard!
        return MKCircleRenderer()
    }

    func mapView(mapView: MKMapView, annotationView view: MKAnnotationView, calloutAccessoryControlTapped control: UIControl) {
        if (!view.annotation!.isKindOfClass(MKCircle.self)) { return }
            if let circle = view.annotation as? MKCircle {
                if let index = self.previousGeofences.indexOf({ $0.circle == circle }) {
                    let geofence = self.previousGeofences[index]
                    self.previousGeofences.removeAtIndex(index)

                    self.circle = nil
                    replaceFirstWithCoordinate(geofence.points[0])
                    replaceSecondWithCoordinate(geofence.points[1])
                    self.title = geofence.title
                }
            }
        }
}

