You will quickly discover what the locals have known for centuries: the tuff rock keeps rooms cool in summer and warm in winter.

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The loser is the owner of that real-life store: the person who has stocked the merchandise, hired the staff, paid to keep the store cool in summer and warm in winter, written the rent checks and the tax checks.

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This style, found almost nowhere else in Germany, uses dry straw and water reed to build the roofs, resulting in a home that is cool in the summer and warm in winter.

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The heating and cooling systems use air that has been earth-tempered drawn into a large tube and passed through the ground, which has a consistent temperature that is cool in the summer and warm in the winter.

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Highly effective, and completely maintenance free, it kept their pueblos warm in winter, and cool in the summer using only stone age technology.

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By tapping that temperature, Fort Knox can keep cool on hot summer days and warm up in the dead of winter.

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