https://en.wikipedia.org/wiki/Stone_of_Scone
Is the Stone of Scone the missing keystone from the Arch of Palmyra?
In old paintings, the stone seems to exist in the ruins, but in any modern photographs.
Meth Gators
Eye
Medulla Oblongata
https://en.wikipedia.org/wiki/Temple_of_Poseidon,_Sounion