The Hecates Tholus volcano taken by the High Resolution Stereo Camera (HRSC) on Mars Express in orbit 32 from an altitude of 275 km, in 3D left) and in full colour. The image shows the summit caldera of Hecates Tholus, the northernmost volcano of the Elysium volcano group. The volcano reveals multiple caldera collapses. On the flanks of Hecates Tholus several flow features related to water (lines radiating outwards) and pit chains related to lava can be observed. The volcano has an elevation of 5300 m, the caldera has a diameter of maximum 10 km and a depth of 600 m. North is on the right.