Live ATC

Here you can listen communication between real world pilots and air traffic controllers. Many airports from all over the world are listed, including Václav Havel airport – LKPR.

Flight Radar 24

Great page for aviation enthusiast. You can watch real air traffic almost in real time. You can view flight path, altitude, airspeed, origin and destination and even photo (if someone ever took a picture of that particular aircraft) for every displayed airplane.