Egypt's summer (Jun–Aug) is stifling and best avoided unless you enjoy searing temperatures. Spring (Mar–May) and fall (Sep–Nov) are more manageable heat-wise, but winter (Dec–Feb), with its pleasantly warm, sunny weather, is when most choose to visit. Visas are required; most nationalities can buy one upon arrival. Most international flights land at Cairo (CAI) but there are also services direct to Alexandria's Burg al-Arab (HBE), Luxor (LXR), and Sharm al-Sheikh (SSH). The bus network is extensive. The train is useful for journeys between Cairo and Upper Egypt (Luxor, Aswan), and to Alexandria. The language is Egyptian Arabic; the currency is the Egyptian pound, pronounced "guinea." Electricity is 220 volts with European 2-pin sockets.