Continuum intensity image of a sunspot observed by Hinode/SOT-SP [reproduced from Tiwari et al. (2015) by permission of ESO]. Locations of a couple of umbral dots (UDs), penumbral filaments (PFs), spines, penumbral grains (which are actually heads of filaments), and a light bridge (LB) are pointed to by arrows. A larger arrow in the center of the sunspot umbra points to the direction of the solar disk center. The scale of the picture is 64″ × 64″. To clearly visualize the penumbral features (including dark lanes on penumbral filaments), a zoomed-in view of a small FOV of the sunspot penumbra, outlined by the dash-dotted box, is displayed on the right. (Color online)