Russia: A World Apart is a haunting evocation of the ruined country estates of the Russian aristocracy of the 18th and 19th centuries. Revolution, civil war, invasion, anarchy and casual indifference have conspired against many of the grand buildings of Russia's rich and complex past. The architectural riches of Moscow and St Petersburg still exist for everyone to see, but when the photographer Simon Marsden and author Duncan McLaren entered the Russian countryside, away from the obvious tourist trails, they encountered a very different world.