Geography of Dorset is the Blackmore Vale, a relatively low-lying area of clays and limestones of Jurassic age. The south-east of the county forms part of the Hampshire Basin, an asymmetric syncline covered in sands and gravels of Paleogene age. The main rivers in the county are the Stour, Frome and Piddle. The Stour is the county's largest river, although its source is in the neighbouring county of Wiltshire. The Frome and Piddle both lie wholly within the county. The whole of Dorset's coastline is designated part of the Jurassic Coast World Heritage Site, and contains examples of many different coastal landforms, reflecting
Monasteries on the slopes of Popocatépetl UNESCO World Heritage Site consists of fourteen monasteries that are located south and east of Mexico City, most in the state of Morelos, with three in the state of Puebla. The monasteries in Morelos are located in the municipalities of Atlatlahucan, Cuernavaca, Tetela del Volcán (including the one in Hueyapan), Yautepec, Ocuituco, Tepoztlán, Tlayacapan, Totolapan, Yecapixtla and Zacualpan de Amilpas. The three in Puebla are located in Calpan, Huejotzingo and Tochimilco . Most, but not all, of these monasteries are located on the periphery of the Popocatepetl volcano. They were declared a World Heritage Site on 17 December 1994, due