A three-dimensional graphical user interface includes a graphical display, and a memory storing a geometric space including a plurality of three-dimensional cells. Each cell is linked to at least one other cell through an adjoining surface. A program memory includes instructions for causing the graphical user interface to display an interior view of one of the cells, the view controllable by the user through a walkthrough interface, and display an exterior view of the geometric space, the view controllable by the user through rotation and zoom functions.