ATHENS METRO
The Athens(Capital of Greece) Metro system, began in its modern form in 1991, has used Greek, German, and French companies to construct a three-line system that covers the center of Athens and extends to its nearest suburbs. Having already spent over 2 billion
euros and still under construction, this mammoth project has improved the lives of Athenians and tourists alike.
With over a half million daily riders the city has less traffic, less pollution, and more culture (there are three Metro stations with free public museums). The planned extensions are projected to be finished in time for the 2004 Olympics and judging by the 24-hour a day work, they just might reach their goal.
The fare of €1 is valid for 90 minutes and any transfers within that period provided you do not leave the station.

TRAINS GREECE
The rail network in Greece covers the major cities but is not incredibly efficient outside of the major routes. The Athens-Thessaloniki and Athens-Patra routes are the busiest and therefore the most efficient. The small gauge line that runs throughout the Peloponnese is separate from the lines that run throughout the rest of Greece. 

BUSES GREECE
Bus travel in Greece is a good way to get around. Whether it is between two major cities, within a major city, or on an island, there are plenty of networks to use. Best of all, the price of bus travel is extremely economical.

National
The national network of buses is run by KTEL (Kratiko Tamio Ellinikon Leoforion). All of the major cities in Greece are connected as well as most of the smaller ones. Even the tiniest islands have minimal bus service. Don't be surprised if the bus makes several stops between cities that appear to be for a person standing in the middle of nowhere. In most cases it is a stop, but usually the kind only locals know about. If you ever do catch a bus from a place like this, you be allowed to purchase your ticket on the bus. Tickets should be purchased in advance on the busiest routes, although for most it is sufficient to arrive early to the station and get a ticket. Assigned seating depends on how busy your route is. At a minimum, the Athens-Patra and Athens-Thessaloniki routes always have assigned seating.

In large cities there can often be more than one station with each different station servicing different parts of Greece. For example, in Athens Terminal A, which serves all western destinations, is located at 100 Kifissou St. Terminal B, which serves all other destinations, is located at 260 Liossion St., approximately a 10 to 15 minute drive from Terminal A. Traffic in the area is bad, so allow plenty of time if you are transferring between terminals.

Islands (Greek islands)
Most islands have their own network of buses. The times and frequency will change depending on the season. The schedules are normally posted at the island's main terminal, which is useless if you are at one of the other stops. It is rare to ever find a map that visually shows the route of the bus. In most cases you are either expected to know where the bus goes or to know the name and location of the towns it stops in. On the tiniest of islands there is normally one daily bus to the island's largest town that leaves early in the morning and returns at mid-afternoon.

City
All major cities have extensive bus networks. The Athens network, AUTO (Athens Urban Transportation Organization or in Greek, OASA, Organismos Astikon Siginonion Athinon) includes modern, air-conditioned buses that run basically anywhere you'd like to go. Tickets should be bought in advance from kiosks or news stands (kioski). At the time of publication a one-way ticket cost €0.45. When waiting for the bus, it is important to remember that you must put your arm up when your desired bus approaches or else it won't stop. You should enter the bus from one of the middle doors. After entering, be sure to use one of the orange machines to stamp the time on your ticket. Violators will be fined 40 times the amount of the fare on the spot if they are caught during a random check.