From hidden waterfalls to glow worm grottos, these destinations are a dream for both travelers and the environment. http://on.natgeo.com/2rbw31K

From hidden waterfalls to glow worm grottos, these destinations are a dream for both travelers and the environment. http://on.natgeo.com/2rbw31K 

https://twitter.com/NatGeoTravel/status/872996702436896769