ACAC '16 will take place at the main amphitheater of the Department of Informatics and Telecommunications of the University of Athens (Ilissia campus).

You can use this Google Map to get directions to and from the venue. Some general guidelines are:

By car: Make sure to use the main campus entrance (Olof Palme - Imittou street). The other two entrances are kept closed throughout most of the day.

Airport: The best way is to use the Metro (subway) line 3 (aka blue line) to get to the city centre and close to the University campus ("Evangelismos" stop). The ticket costs 8 euros -- buy it at a Metro station or from a (public transportation tickets) kiosk.
Alternatively, you can use bus line X95 -- buy the ticket from the driver.
A taxi fare from and to the airport will normally cost 35 euros.

By bus: Line 224 ("Dekati Kessarianis" stop). The bus stop for the other direction (leaving the campus) is just opposite across the street.

On foot: you can walk from the main campus entrance once you've reached it (around a 10 mins walk).