Stacked regions of Planck maps corresponding to the locations of the superstructures identified by GR08. From left to right we show the images resulting from stacking of the 50 superclusters, the 50 supervoids, and the difference of the two. The black circles superimposed indicate the angular radius at which the signal-to-noise ratio is highest. See Fig. 7 for the corresponding temperature and photometry profiles, as well as their statistical significance.