One of the Russian art galleries or museums, I think perhaps in St
Petersburg, has a virtual tour on their website where you can walk around all
the galleries in 3D as if you were there (like those semi-video tours that
estate agents do). I read about this in some art blog recently. URL?
Unfortunately, the answer by answerfinder demonstrates that we're still far from the day, in which we could save the flight tickets to Russia and just see the exhibits from our couch (or computer chair). The museum offers some sort of a virtual visit, but it will never be as being there!