Travel through time, explore Africa's Okavango River, and journey to the Red Planet, all at #NatGeoFest. http://on.natgeo.com/2s4LwEh pic.twitter.com/WreSevjnRO

Travel through time, explore Africa's Okavango River, and journey to the Red Planet, all at #NatGeoFest. http://on.natgeo.com/2s4LwEh  http://pic.twitter.com/WreSevjnRO

https://twitter.com/NatGeoTravel/status/875345920220700672