The United States is filled with mountains and valleys, from thousands of feet above sea level to hundreds of feet ...

Throughout the year, the sand dunes remain one of the most popular stops in Death Valley National Park. It's not uncommon to ...

At 282 feet below sea level, it is both the lowest and driest point in North America, and its record-setting temperature of 134 degrees Fahrenheit makes it the hottest place on Earth. The massive salt ...