The large and dim emission nebula Sh2-155 in Cepheus lies at a distance of 2400 light-years away and spans another 35 light-years across. It is characterized with rich H-II emission nebulosity with the northern half of the nebula being significantly brighter than the southern half. Commonly referred to as the Cave Nebula owing to a circular formation near the center resembling a cave, Sh2-155 is also characterized with reflection nebulosity (vdB 155) and as indicated by the small bluish nebulosity to the lower right as well as dark nebulae to the southwest. Star formation in Sh2-155 is believed to be low. Further details at http://www.perseus.gr/Astro-DSO-Nebulae-Sh2-155.htm .