In the last 50 years alone, hundreds of natural landmarks have drastically shape-shifted, never to return to their former states http://on.natgeo.com/2oaJnnf

In the last 50 years alone, hundreds of natural landmarks have drastically shape-shifted, never to return to their former states http://on.natgeo.com/2oaJnnf 

https://twitter.com/NatGeoTravel/status/964544994353778689