Son Doong Cave, Mount Everest – attractive destinations in the next 20 years

Viet Nam’s Son Doong cave, Mount Everest and Grand Canyon are predicted to become the most attractive destinations for tourists in the next 20 years, according to the Huffington Post.
The US online news aggregator has released a list of famous places in the world which will become “hotspots” for visitors over the next two decades. One of the places cited is Son Doong cave – the world’s largest natural cave in Viet Nam.
Son Doong cave is considered an interesting destination for a 7-day tour with discovery of underground rivers, caves and camping activities.