Greek workers are striking to protest government plans to fire thousands of civil servants.
Tuesday's strike disrupted public services and slowed down most hospitals. Rail and plane schedules are also being affected.
Tourists hoping to see the ancient Acropolis Hill in Athens were turned away. Some tourists sympathized with the Greeks on strike, while others there left frustrated.
"It is so disappointing. Very terrible.''
"I am very upset because we are two to three days up in Athens, and it's impossible to see the archaeology and the Acropolis. So it's...I don't understand why.''
Athens must reform and shrink its civil service to receive more bailout funds from foreign lenders, but the latest job cuts plan has sparked uproar among Greeks.
The debt-wracked country has enacted a string of austerity measures recently in return for multi-billion euro international bailouts to avoid default.