 Remnants of other civilizations are found throughout the country.Archaeologists have studied sites such as and La Sierra in the Naco Valley, Los Naranjos on Lake Yojoa, Yarumela in the Comayagua Valley, La Ceiba and Salitron Viejo (both now under the Cajón Dam reservoir), Selin Farm and Cuyamel in the Aguan valley, Cerro Palenque, Travesia, Curruste, Ticamaya, Despoloncal, and Playa de los Muertos in the lower Ulúa River valley, and many others.In 2012, LiDAR scanning revealed that several previously unknown high density settlements existed in La Mosquitia, corresponding to the legend of "La Ciudad Blanca".