There’s hidden treasure in the town of Coober Pedy, Australia. Glowing gems called opals lie buried in the ground. The most beautiful opals glitter like magical stones.
And these stones are incredibly valuable—a perfect opal can be worth $1 million.
Thousands of people have traveled to Coober Pedy hoping to get rich. Today, the town has a population of more than 3,500 and produces 70 percent of the world’s opals.
But if you visit Coober Pedy, you might find that it seems surprisingly quiet. As you explore the town, you’ll notice some unusual things.
Chimneys poke out of the ground, and doorways have been carved into hillsides. Signs warn people to watch out for “unmarked holes.”
By now you may have figured out the mystery. Opals aren’t the only things buried in Coober Pedy. Half the townspeople live underground.