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
Fortifications on the Caribbean Side of Panama: Portobelo-San Lorenzo The Chagres River site includes: Fortifications on the Caribbean Side of Panama: Portobelo-San Lorenzo The fortifications on the Caribbean Side of Panama: Portobelo-San Lorenzo are military constructions, built by the Spanish Empire during the 17th and 18th centuries on the Caribbean coastline of Colón Province in Panama. The ruins are located on the coast of the province of Colón. In view of their cultural importance, the sites have been inscribed by UNESCO in 1980 as a World Heritage Site under Criteria (i) and (iv), with the description, "Magnificent examples of 17th- and 18th-century military architecture, these Panamanian forts on the