Cappadocia (Turkish Kapadokya) is a region in central Turkey, largely in Nevşehir Province.The name was traditionally used in Christian sources throughout history and is still widely used as an international tourism concept to define a region of exceptional natural wonders characterized by fairy chimneys and a unique historical and cultural heritage. The term, as used in tourism, roughly corresponds to present-day Nevşehir Province of Turkey.Cappadocia's limits are debated. In the time of Herodotus, the Cappadocians are supposed to have occupied the whole region from Mount Taurus to the vicinity of the Euxine (Black Sea). Cappadocia, in this sense, was bounded in the south by the chain of Mount Taurus, to the east by the Euphrates, to the north by Pontus, and to the west by Lake Tuz, in Central Anatolia. But Strabo, the only ancient author to provide a major account of the area, greatly exaggerated its dimensions. It is now believed that 400 km (250 mi) east-west by 200 km (120 mi) north-south is a more realistic appraisal of Cappadocia's area. The earliest record of the name of Cappadocia dates from the late 6th century BC, when it appears in the trilingual inscriptions of two early Achaemenid kings, Darius I and Xerxes, as one of the countries (Old Persian dahyu-) which are part of the Persian Empire. In these lists of countries, the Old Persian name is Katpatuka, but it is clearly not a native Persian word. The Elamite and Akkadian language versions of the inscriptions contain a similar name from Akkadian katpa "side" (cf. Heb katef) and a chief or ancestor's name, Tuka.