The word possibly has a Scandinavian origin: Old Swedish bunke means "boards used to protect the cargo of a ship". In the 19th century the word came to describe a coal store in a house, or below decks in a ship. It was also used for a sand-filled depression installed on a golf course as a hazard.

Who has the most bunkers in the world?

One of over 173,000 bunkers built in Albania during the rule of Enver Hoxha. Concrete military bunkers are a ubiquitous sight in Albania, with an average of 5.7 bunkers for every square kilometre (14.7 per square mile).

How long can you survive in a bunker?

Theoretically a person can last three days without water and three weeks without food. Stocking your bunker with water is an area when many people come up short. There's no telling how long you might be stuck in your bunker so it's important to have a large cache of water.