The three roughly E-W-trending cones at the center of this NASA Landsat image (with north to the top) form the Nevados Casiri complex, the southernmost Holocene volcano in Perú. A fourth cone, the youngest of the complex, lies on the SE side and was the source of two fresh Holocene lava flows, which form the dark-colored lobes visible south of the massif. Two sulfur mines have been opened on the NW and SE flanks of Nevados Casiri. NASA Landsat7 image (worldwind.arc.nasa.gov)