I came across
this site today which I find rather amusing to watch for a while.
It's a realtime radar of the commercial Airliners over Scandinavia.
On some maps they use the radar, on other maps it's a transponder most Airliners have.
When you click on one of the planes, an infobox shows up with all data and flight details.
In the picture, I clicked one (red) - and as you can see it's an Airbus 319, from London bound for Moskva. (Moscau)
Left of the infobox you have Copenhagen Airport (pink dot) - and in the picture you can see a departuring - as well as an incoming plane. Quite fun to watch the patterns they take around the airport combined with the altitude and speed.
Quite amazing.