We have added a row of buttons where the user can press to focus on a specific place. By tapping on one of these buttons, a new method will be called, _animateMapCameraTo, for Stonehenge, for example:

RaisedButton(
    child: Text("Stonehenge"),
    onPressed: () {
        _animateMapCameraTo(_stonehengePosition);
    },
),

The new method is responsible for requesting the camera update:

  void _animateMapCameraTo(LatLng position) {
    _mapController.animateCamera(CameraUpdate.newLatLng(position));
  }

As you can see, through the GoogleMapController instance retrieved before, we can dispatch a camera animation to a new location on the map.