The ancient Greeks considered Delphi to be the navel or centre of the world; see image 7 for the purported "Belly Button of the World" from which, if one travelled in a straight line, you would return to this same spot. So the ancient Greeks believed the world was spherical.

During my stay in Athens, I took a day trip by bus north to the town of Kalambaka. From there, I joined a guided tour of the amazing Meteora Monasteries, Greek Orthodox religious retreats perched atop the surrounding mountains. Dramatic scenery and an incredible history. Highly recommend visiting if you are in Greece.

On my second full day in Athens, I walked around the ruins of the Temple of Olympian Zeus and the Olympic Stadium for the first modern Olympic Games . Also, I climbed Ardittos Hill for great views of the stadium, the Acropolis and Athens. Finishing with a walk through Zappeion Garden and the Conference Centre.