Photos of Greece's colossal shipping port show you why the economy is in tatters

ATHENS, Greece - The Greek referendum on whether or not to accept the country's international bailout deal has made international headlines, and the queues outside the country's banks have become a symbol of what's going wrong in the country.

But there are other visual signs that Greece's economy has deep, structural problems.

I went out to Piraeus, Greece's biggest port, to see what things looked like. It's not far from Athens and is the national hub for shipping, one of Greece's biggest industries.

But once you're there, you can see why despite all this activity, the country's economy is in such an awful state.