Worth knowing
Vietnam
A local man, Ho Khanh, found the mouth of Son Doong cave around 1990, but it was not surveyed until 2009. Inside are a fast underground river and a patch of jungle growing where the roof has fallen in.
Where its story happens
Son Doong cave, at 17.46°N, 106.29°E. It's the place the game marks on the globe once the country is found. See it on a map.
Five things to know about Vietnam
In Geodar these are the five clues to this country, and it counts as one of the easy countries. The game asks the hardest clue first. Here the easiest comes first.
- Where it is. It's Vietnam, the long S-shaped country on the eastern edge of mainland Southeast Asia. See Vietnam on a map.
- Its noodle soup, pho, is loved around the world, and its capital is Hanoi.
- More than 1,600 limestone islands rise from the sea in one of its bays.
- About a third of its people share the same family name.
- The largest cave on Earth is here: its main passage is over 5 km long and could swallow a 40-storey tower.