1. A computer-implemented method for generating a navigation graphical user interface (GUI) for navigating a three-dimensional (3D) environment associated with a multiscale 3D dataset, the method comprising: receiving a current position within the 3D environment, wherein a visible portion of the 3D environment is rendered for display based on a perspective associated with the current position; identifying a 3D object that resides within a non-visible portion of the 3D environment; and causing an object indicator to be displayed within the visible portion of the 3D environment, wherein the object indicator has an orientation that indicates the position of the 3D object within the non-visible portion of the 3D environment relative to the current position.