A remote mining town in the Australian outback called Coober Pedy is located about 22 feet under the Earth's surface. The homes are called dugouts and provide housing for about 1,500 families. You'll also find two churches and a bar in their own dugout spaces. The unique town was built to house opal miners, dating back to 1915.
On Extreme Homes, take an inside look at Zurich's Earth Houses which are specially designed for energy efficiency. These homes are tucked deep beneath the ground, have a round circular shape which helps them to survive strong winds and natural storms.