...and once again, I wish I had taken more history in school. History upon history upon history everywhere. Each time a shovel is sunk into the earth in the old city, ruins are revealed. Sewer systems, house foundations, mosaic floors, wells and walls. The foundation engineers of Athens are a pretty resourceful lot managing to redesign (at short notice I am sure), the substructure of a building to minimize impact on the ruins. But mostly they are just that, ruins. Even the famed Parthenon, perched magnificently atop the Acropolis, is on a shimmer of its former self. A few millennia and vandals such as the Christians, the Ottomans and Lord Elgin have pared down this extraordinary structure to a few columns and the odd frieze. And despite this, it remains impressive. The precision with which these huge lumps of rock, way up in the air, were put together with the limited technology at the time is remarkable, even when you have slaves to do the heavy lifting. We expl...