Look back at some of this year's greatest stories, from an epic winter attempt to summit K2 to a harrowing escape from a flooded cave. https://on.natgeo.com/2rtdkAY

Look back at some of this year's greatest stories, from an epic winter attempt to summit K2 to a harrowing escape from a flooded cave. https://on.natgeo.com/2rtdkAY 

https://twitter.com/NatGeoTravel/status/1071253135887400960