Angustus Labyrinthus is a unique region near the south polar cap. The squares formed by intersecting ridges have given the feature the informal name of Inca City. The linear ridges are believed to have formed by volcanic and tectonic forces, where magma filled fractures in the subsurface and then erosion revealed the magmatic material. Orbit Number: 76172 Latitude: -81.2617 Longitude: 295.232 Instrument: VIS Captured: 2019-02-15 06:40 https://photojournal.jpl.nasa.gov/catalog/PIA23190