Poenari Castle also known as Poenari Citadel (Cetatea Poenari in Romanian), is a ruined castle in Romania, in Argeş County (Căpăţânenii Pământeni village of the Arefu commune) on a canyon formed on the Argeş River valley, close to the Făgăraş Mountains. It stands on a cliff, on the right side of the Transfăgărăşan road which climbs high into the mountains. Poenari Castle is said to be one of the most haunted places in the world.
This county has a total area of 6,862 km². The relief can be split into 3 distinctive parts. In the north side there are the mountains, from the Southern Carpathians group - the Făgăraş Mountains with Moldoveanu Peak (2,544 m), Negoiu Peak (2,535 m) and Vanatoarea lui Buteanu peak (2,508 m) towering the region, and in the North-East part the Leaotă Mountains. Between them there is a pass towards Braşov, the Rucăr-Bran Passage. The heights decrease, and in the center there are the sub-carpathian hills, with heights around 800 m, crossed with very deep valleys. In the south there is the northern part of the Romanian Plain.The main river that crosses the county is the Argeş River in which almost all the other rivers coming from the mountains flow. In the south the main rivers are the Vedea River and the Teleorman River.