One of the most controversial sections of the new works is the construction of a rowing center in Schinias close to the tomb of Marathon. Environmentalists have protested that it will stimulate too much future development.
But the important coastal wetland 40km from Athens is currently a mess, criss crossed by agricultural drainage and incorporating a motor cross track, an old military airbase and unplanned building. These will be removed and 1,500ha of wetlands rehabilitated, says ATHOC, while 120ha of already developed land will become the main rowing centre.
Future restrictions on recreational use will be intensified and vehicle access will be limited; stands used in the Games will be removed. Parking during the Games will be at a distance and the spectators will be shuttled in.
An International Olympic Committee delegation last week endorsed use of the area - now a national park - and said it gave the best option for its regeneration.