Possible Clues:

• Billboard, to many
• Very ugly building
• Gentrification target
• Weedy vacant lot, e.g
• It's not pretty to look at
• Blemish
• I heard about Cupid's bit of nastiness
• Condemned building, maybe
• I agree with gold (apart from mistakes outside) - 16!
• Overlooks nothing concerning a blight on the landscape