Imagine peeling back miles of frozen white and revealing valleys, rivers, and mountains that haven't seen sunlight in tens of ...

America's geological wonders don't need erupting volcanoes to create breathtaking spectacles that look straight out of a science fiction movie. From towering mushroom-shaped rocks to mysterious moving ...

Lucky for you, the Earth is vast and strange, and that means it has a host of otherworldly landscapes just waiting for your exploration—no spaceship required. Click through the gallery and take a tour ...