Albanian dictator Enver Hoxha, who ruled the country from 1945 to 1985, was paranoid about foreign invasions. He ordered to build more than 900,000 bunkers across the country. Nowadays those bunkers can be found in the very unusual places.

A very cool underground survival bunker built in California. These people are prepared for Dec. 21, 2012. What about you?

Let’s take a look inside.

This World War I bunker was discovered by urban explorers somewhere in France.