These ancient sites are prime locales for gazing into distant stars and planets http://on.natgeo.com/2zPlzO0 pic.twitter.com/Hr0gD4sIbZ

These ancient sites are prime locales for gazing into distant stars and planets http://on.natgeo.com/2zPlzO0  http://pic.twitter.com/Hr0gD4sIbZ

https://twitter.com/NatGeoTravel/status/929151694897741824