A 3D graphical user interface includes a two-dimensional ground-plane layout representing the relationship between one or more leaf elements of a tree data structure. The interface further includes at least one building-like structure, each of the at least one building-like structure corresponding to a respective one of the one or more leaf elements. Each of the at least one building-like structure provides a summary of media associated with the respective one of the more leaf elements corresponding to at least one building-like structure.