"When people find out about that they're going to say 'who put that there?'," Buzz Aldrin once said of the monolith.

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

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.

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 ...