Foster + Partners have clearly been busy on the large-scale eco front with another offering in the Russian city of Khanty Mansyisk. This 280-meter tall tower is built like a cut diamond to maximize daylight through the winter months by the refraction of light. Of the project, the architecture firm says, "this mixed-use scheme will create an elegant and crystalline landmark, providing crucial new amenities for its citizens—a place for living, working and leisure, sheltered from the harsh Siberian climate."