a), b) WAC image of Imhotep region and a similar view with colorized regions overlapped. The Imhotep region borders The Khepry, Ash and Apis regions in addition to at least one currently non-illuminated region. c) NAC image showing the smooth deposits (S), linear features (features B′, B′′, and C′), circular mounds (D), possible terraces (B and C), a 40-m-wide boulder (F) and circular mesa (A). d) A close-up of the same image for the circular mesa showing the fractures that appear to form polygonal patterns in some locations (see arrows).