Devil's Highway (Roman Britain) Devil's Highway (Roman Britain) The Devil's Highway was a Roman road in Britain connecting Londinium (London) to Pontes (Staines) and then Calleva Atrebatum (Silchester). The bridges at Pontes probably crossed Church Island. At Calleva, the road split into three routes continuing west: the Port Way to Sorviodunum (Old Sarum), Ermin Way to Glevum (Gloucester), and the road to Aquae Sulis (Bath). Its name probably derives from later ignorance of its origin and history, having been replaced for travellers by other roads nearby such as Nine Mile Ride, which runs parallel to the Roman road about a mile away but at
Geothermal energy a renewable energy source like geothermal. But as a result of government assisted research and industry experience, the cost of generating geothermal power has decreased by 25% over the past two decades. In 2001, geothermal energy costs between two and ten US cents per kWh. Hot springs have been used for bathing at least since Paleolithic times. The oldest known spa is a stone pool on China's Lisan mountain built in the Qin Dynasty in the 3rd century BC, at the same site where the Huaqing Chi palace was later built. In the first century AD, Romans conquered "Aquae Sulis",