The fact is that the the natural coastal environment from Spain, France to Italy has to a large extent been destroyed by rapid urbanisation and especially a policy of attracting tourists through the building of houses and resorts on the beach. In the face of this limited competition, Greece does have some of the best beaches in the Med and the world.
However. And this is the point i wanted to make, if we do what the other countries did, and follow this governments policy of building on beaches, we will destroy them just like the other countries have with their beaches. Its not rocket science. Sure, now, the beaches are nice, but if we continue along our current path... And the problem is i dont see any measures in place to protect the environment. And the government is furiously promoting property tourism, while i don't see any other economic development policies such as an IT policy for example.
Anyway here are some links for you
Mediterranean Basin on brink of ruin
Mediterranean faces ruin