The Utrecht University Library by Wiel Arets is completely black inside, except for the furniture (which is red) and the color provided by the books themselves and their readers. Light enters the space through windows etched with an image of tall grasses, a reminder not only of the countryside, but of the materials used to make paper. This haunting library with its calm interior offers readers a whole range of different spaces to work in. You can sit in large open areas, enjoying the light coming in through the windows and the sight of dozens of other readers working away around you. Or you can find desks hidden away in the book stacks, far from prying eyes (the perfect place to escape the outside world and immerse yourself in books).