Aquae Calidae, Bulgaria Prista on the Danube. Near the baths a road station (statio milliaria) was created with the name Aquae Calidae. The Sanctuary of the Three Nymphs continued to exist next to the station and the Baths, and became known as the Nymphaeum of Anchialos. Under Septimius Severus in 209-211 three years of games and celebrations under the name of Severia Nymphaea took place in the baths. Games also took place in Aquae Calidae under the emperors Geta and Caracalla. Jordanes, who lived in the 6th century, described in his work Getica the incursions of Gothic tribes on the southern Black Sea
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",