Do you know about metro in Yekaterinburg?
The Ekaterinburg currently has just nine stations and one line, running north-south. But there are plans to add two new lines running east-west and south east-north west. The trains are of similar vintage to those in Moscow but are cleaner. Some of the stations are quite pretty so it's worth taking a trip just to see them.

One trip on the metro costs 28Rub (€0.35)