Ekaterinburg (or Yekaterinburg) is the fourth largest city in Russia located in the Ural mountains, although the city itself is as flat as a pancake. It's known as an industrial city, but luckily they managed to keep the industry away from the city centre.
Ekaterinburg is famous for the Church on the Blood, (of which you see a picture on the left), and is built on the place where the last Tsar Nicolas II and his familiy was murdered. Geographic enthousiasts will find this city interesting because it's located more or less on the border with Europe and Azia.
In contrast to opinions of other travellers, I experienced Ekaterinburg as a very pleasant city however it is clearly not designed for tourists. It could be a nightmare if you don't speak or can't read some Russian, so if you ever decide to visit this city, then at least learn to read the cyrillic characters. The express trains (Trans Siberian, Trans Mongolian) that depart from Moscow all stop in Ekaterinburg so if you in one of these trains, I can recommend to get off here and go wandering in this exciting city.