Greece is a country in southeastern Europe, on the southern tip of the Balkan peninsula. Much of the country consists of peninsulas and islands in the Aegean, Ionian, and Mediterranean Seas. It borders Albania, the Republic of Macedonia, Bulgaria, and Turkey. Ancient Greece was one of Europe's first urban civilizations, and the origin of much of the arts, language, philosophy, politics, and sports of western society. The cultural heritage and spectacular mountains and beaches draw tourists from far away. Visitors are drawn to the country's beaches and reliable sunny summer weather, its nightlife, historical sites and natural beauty. In 2007, Greece received 17 million visitors, a large number for a small country of 11 million. The majority of visitors come to Greece come from other European countries, although in recent years tourists from other world regions have been increasing in number. The vast majority of visitors visit from April through to October. Peak season is July through August, and most of the tourists and tourism industry are concentrated in Crete, the Dodecanese, Cyclades, and Western Greek Islands, and to a lesser extent the Peloponnese and the Halkidiki peninsula in Macedonia. There are still many rewarding areas in the country free of large-scale tourism. Many first-time visitors arrive in Greece with specific images in mind and are surprised to discover a country with such regional and architectural diversity. The famous whitewashed homes and charming blue-domed churches only characterise a specific region of the country (the Cyclades Islands). Architecture varies greatly from one region to the next depending on the local history. Visitors will find Neoclassical architecture in the cities of Ermoupolis and Nafplion, Ottoman-influenced buildings in Grevena and Kozani, whitewashed Cycladic homes on the island of Paros, and pastel-coloured baroque homes and churches on Corfu. The nation's terrain is just as varied as its architectural heritage: idyllic beaches, towering mountain ranges, wine-producing valleys, vast stretches of olive orchards in the south, and lush forests in the north. Greece's historical sights are just as varied; the country is littered with just as many medieval churches and castles as classical ruins and temples.