Demonstrating that wealth and eccentricity do go hand-in-hand, this triangular island-fortress smack-dab in the middle of St. Petersburg (purchased by Roman Abramovich for $400 million) was historically the ship-building equivalent of Willy Wonka’s Chocolate factory. The island may be considerably less exclusive soon, however, as it is currently undergoing a serious overhaul to protect the historical architecture, while creating a new “city-within-a-city” public space.