Can you guess what this sign is? (I know the answer)
Answer: It is the LRT subway sign (Light Rail Transit). You see, there is a train moving from left to right to a tunnel. The entrance of the tunnel in this image looks like the Holy Shrine of Emam Reza in Mashhad (or looks like all the mosques).
Location: Ferdowsi University's LRT Station, Vakil Abad Boulevard, Mashhad