Libya is an ancient crossroads of civilizations that bequeathed to the Libyan coast some of the finest Roman and Greek ruins in existence, among them Leptis Magna, Cyrene and Sabratha. Libya also has some of the most beautiful corners of the Sahara Desert, from seas of sand the size of Switzerland and sheltering palm-fringed lakes (the Ubari Sand Sea) to remote massifs adorned with prehistoric rock art (the Jebel Acacus), labyrinthine caravan towns (Ghadames) and an isolated black-as-black volcano (Wawa al-Namus) in the desert's heart.