Images of Mars taken from orbit show thousands of mounds in a region sculpted by water billions of years ago. A robotic mission may investigate the area one day.

With Las Vegas' red rocks burdened by sizable crowds throughout the year, this Arizona outdoor escape is a true hidden treasure.

At the center of Uluru–Kata Tjuta National Park is the physical and cultural heart of Australia, a red sandstone monolith called Uluru (or Ayers Rock, its colonial name) that towers over the ...