Welcome to Athens, Greece! Athens is serviced by a variety of transportation means, forming the largest mass transit system of Greece. The Athens Mass Transit System consists of a large bus fleet, a trolleybus fleet that mainly serves Athens's city center, the city's Metro, a commuter rail service and a tram network, connecting the southern suburbs to the city centre. Athens is served by the Athens International Airport (ATH), located near the town of Spata, in the eastern Messoghia plain, some 35 km (22 mi) east of Athens. Athens airport, awarded the "European Airport of the Year 2004" Award, is intended as an expandable hub for air travel in southeastern Europe and was constructed in 51 months, costing 2.2 billion euros. It employs a staff of 14,000. The airport is served by the Metro, the suburban rail, buses to Piraeus port, Athens' city centre and its suburbs, and also taxis. The airport accommodates 65 landings and take-offs per hour, with its 24-passenger boarding bridges, 144 check-in counters and broader 150,000 m2 (1,614,587 sq ft) main terminal; and a commercial area of 7,000 m2 (75,347 sq ft) which includes cafés, duty-free shops, and a small museum. Athens contributes very much to the tourism industry of the entire Greek country suggesting a long list of archaeological sites, archaic monuments and old towns. Tourism in Athens is highly developed all year round, although the most popular months are from April to October. The weather is really enjoyable during those months, and the crowds of tourists are still far from sight, which makes visits to archaeological sites, museum and places a lot easier, and the rooms cheaper to book.