I especially love the scene when the Aragorn, Legolas, Gimli and Gandalf approach the city and that wide expanse of land with the snow capped mountains in the background. I have to control myself from bursting out into song: "The Hills Are Alive with the Sound of Music".
The very helpful http://lotr.wikia.com/wiki/Edoras tells us it was filmed in "Mount Sunday in the upper reaches of the Rangitata Valley, near Erewhon" in lovely New Zealand.
In this video by jediking12 we can look at Rohan while listening to the Rohan Fanfare, by the amazing Howard Shore, from the Two Towers.
Played by the great Christopher Lee in the LOTR films, he is power mad and will stop at nothing and destroy everyone to achieve his evil ambitions.
But like all good actors, Lee makes you, if only for a few moments in his encounter with Gandalf, believe he is a wise being. Then comes that look in his eyes and we know how wrong we have been all along, and how truly evil is Saruman's heart.