The Valley of Peshawar (Pashto: د لوی پېښور وادي; Urdu: وادئ پشاور), or Peshawar Basin, historically known as the Gandhara Valley, is a broad area situated in the central part of the Khyber Pakhtunkhwa province of Pakistan. The valley is 7,176 km2 (2,771 sq mi) in area, and is traversed by the Kabul River. It has a mean elevation of 345 metres (1,132 ft).[1] The valley takes its name from the city of Peshawar, which is situated at the western part of the valley close to Warsak Dam. To the west of the valley lies the Khyber Pass. The five most populous cities in the valley are Peshawar, Mardan, Swabi, Charsadda, and Nowshera.
^Beal, Samuel, (ed. & trans.), (1884). Si-yu-ki: Buddhist Records of the Wester World, Volume 1, Author: Huen Tsang, p. 112: "Outside the eastern gate of the town of Po-lu-sha is a sangharama with about fifty priests, who all study the Great Vehicle. Here is a stupa built by Asoka-raja [...] To the north-east of Po-lu-sha city about 20 li or so we come to Mount Dantaloka. Above a ridge of that mountain is a stupa built by Asoka-raja."
^Errington, Elizabeth, (1993). "In search of Pa-lu-sha, a city of the central Gandhara plain", in: Bulletin of the Asia Institute, New Series, Volume 7, p. 63: "[R]egarding the Tan-to-lo-ka mountain visited by Xuanzang 'above twenty li' (4 miles/6.4 km) to the northeast of Pa-lu-sha [...], for if the latter is identified as Sahri Bahlol, it seems that the former must be equated with the Takht-i-Bāhi hill."