Figure 17
From: Imaging of underground cavities with cosmic-ray muons from observations at Mt. Echia (Naples)

Left: top view of the known structures in the neighbourhood of the detector. The orange box shows the detector position, below the room indicated by the dashed line. Right: 3D view. The cone, with ∼120° of aperture, represents the angular acceptance of the detector. The drawings were obtained using the software Autodesk AutoCAD 2015.