StoneRoad2013's photos with the keyword: optical illusion

O&S(meme) - Escher again

O&S(meme) - look very carefully

O&S - not an illusion

O&S (meme) - optical dishes

O&S (meme) - Escher was 'ere

O&S - sitting pretty

O&S (meme) - puzzled dog

O&S (meme) - astronomy gif / still

par / O&S (meme) - needs a good look - "Displayed…

O&S - domestic illusion "educational purposes"