A digital map of a geographic area is displayed via a user interface, and a 3D representation of a multi-story building located in the geographic area is displayed on the digital map. The 3D representation includes multiple stacked floor maps corresponding to the floors of the multi-story building. In response to the detection of a pinch gesture that is applied to the 3D representation, a vertical distance between each floor map is expanded relative to the detected pinch gesture to reveal features of an internal map that corresponds to each floor map.