Explore these incredible destinations for sky-watchers, like the top of a crater or under the desert http://on.natgeo.com/2fqU3uj

Explore these incredible destinations for sky-watchers, like the top of a crater or under the desert http://on.natgeo.com/2fqU3uj 

https://twitter.com/NatGeoTravel/status/912814101927272448