Thanks to the National Aeronautics and Space Administration (NASA) and the European Space Agency (ESA), today we have access to images of the Martian surface. Investigating images taken by the Context Camera (CTX) on the Mars Reconnaissance Orbiter (MRO) spacecraft and the High-Resolution Stereo Camera (HRSC) on board ESA's Mars Express spacecraft, I have observed many exceptional structures that I believe are the ruins left by a lost civilization of the ancient times.