It's pretty hard to know where to begin summarising this Google Maps mashup from Spain. The site shows live real-time tracks for planes, ships, satellites around and over Spain. It is also possible to view current wind conditions, get information from local weather stations and do a lot more.
The live tracking sections of the site show you the live positions of boats and planes. If you click on any of the tracked vehicles you can get information that includes departure and destination information. It is also possible to view an animation of the vehicle's course.
To get a sense of the numerous features of this map you really need to visit this site yourself.