I understand that there is a special priced ticket for the Metro to central Athens and it is cheaper to buy for two people at the same time.
"double ticket ( one for two persons ) at 10 euros"
We are only in Athens for three nights - so is it OK to buy two double tickets at the airport station? One for immediate use and the other to get back from central Athens to the airport.
Or ar the tickets fixed with regard to journey direction?
We don't plan on using the metro when we are 'there' - just walking - so I thought it might save hassle on the way back to the airport.
Also - on the metro - where are the ticket validation machines? On the platform or in the carriages?
Thanks in advance for any replies