Where is the famous Unter den Linden in Europe?

Been there It's in Berlin, Germany but to be honest I am not sure it is so famous. I had never heard of it before visiting there!

(P.S - for those who also don't know, it's an avenue where lime trees are planted which you can walk through/under)

If you have heard of Brandenburger Tor or gate, the street that passes through it is Unter den Linden. Named after the trees by that name.

for more information and photos, see:

http://en.wikipedia.org/wiki/Unter_den_Linden