One of the main attractions of Athens , it is the only stadium in the world built entirely of marble .
Stadion Panathinaiko -- The Panathenaic Stadium , also known as Kallimarmaro , is a multi-purpose stadium in Athens , Greece .
One of the main attractions of Athens , Athens is the only Athens in the world built entirely of marble .
Stadion Panathinaiko -- The Panathenaic Stadium , also known as Kallimarmaro , is a multi-purpose stadium in Athens , Greece .